spring-cloud-netflix
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spring-cloud
Bug: Application can't deregister
Describe the bug
When an application tries to deregister itself due to a graceful shutdown, the call fails and, as such, the instance stays with status DOWN in the registry.
- Spring Cloud version: 2025.0.0
- Spring Boot version: 3.5.5
Sample
Logs:
2025-09-09T15:33:18.525+02:00 INFO 3396 --- [HIKU DCD Monitoring Agent] [SpringApplicationShutdownHook] o.s.c.n.e.s.EurekaServiceRegistry : Unregistering application HIKU DCD MONITORING AGE
NT with eureka with status DOWN
2025-09-09T15:33:18.576+02:00 INFO 3396 --- [HIKU DCD Monitoring Agent] [SpringApplicationShutdownHook] o.s.b.w.embedded.netty.GracefulShutdown : Commencing graceful shutdown. Waiting for active
requests to complete
2025-09-09T15:33:18.586+02:00 INFO 3396 --- [HIKU DCD Monitoring Agent] [netty-shutdown] o.s.b.w.embedded.netty.GracefulShutdown : Graceful shutdown complete
2025-09-09T15:33:25.773+02:00 WARN 3396 --- [HIKU DCD Monitoring Agent] [SpringApplicationShutdownHook] io.netty.channel.AbstractChannel : Force-closing a channel whose registration task w
as not accepted by an event loop: [id: 0x70e721e6]
java.util.concurrent.RejectedExecutionException: event executor terminated
at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:934) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:353) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:346) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:836) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:827) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:817) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.register(AbstractChannel.java:482) ~[netty-transport-4.1.124.Final.jar!/:4.1.124.Final]
at reactor.netty.transport.TransportConnector.doInitAndRegister(TransportConnector.java:294) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.transport.TransportConnector.connect(TransportConnector.java:165) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.transport.TransportConnector.connect(TransportConnector.java:124) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(DefaultPooledConnectionProvider.java:547) ~[reactor-netty-core-1.2.9.jar!/:1.2.9
]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4576) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4641) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4542) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4478) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.drainLoop(SimpleDequePool.java:449) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.pendingOffer(SimpleDequePool.java:625) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.doAcquire(SimpleDequePool.java:306) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:425) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onSubscribe(DefaultPooledConnectionProvider.java:218) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool$QueueBorrowerMono.subscribe(SimpleDequePool.java:743) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:196) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:287) ~[reactor-netty-http-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:81) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:290) ~[reactor-netty-http-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4576) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.block(Mono.java:1778) ~[reactor-core-3.7.9.jar!/:3.7.9]
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78) ~[spring-cloud-netflix-eureka-client-4.3.0.jar!/:4.3.0]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:121) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:80) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900) ~[eureka-client-2.0.4.jar!/:2.0.4]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Unknown Source) ~[na:na]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457) ~[spring-beans-6.2.10.jar!/:6.
2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415) ~[spring-beans
-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239) ~[spring-beans-6.2.10.ja
r!/:6.2.10]
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155) ~[spring-boot-3.5.5.jar!/:3.5.5]
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Iterable.forEach(Unknown Source) ~[na:na]
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
2025-09-09T15:33:25.779+02:00 INFO 3396 --- [HIKU DCD Monitoring Agent] [SpringApplicationShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2025-09-09T15:33:25.818+02:00 INFO 3396 --- [HIKU DCD Monitoring Agent] [SpringApplicationShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
application.yaml within the JAR
pring:
application.name: HIKU DCD Monitoring Agent
main.keep-alive: true
threads.virtual.enabled: true
cloud:
refresh.enabled: false
discovery.client.health-indicator.enabled: false
server:
port: 8081
http2.enabled: true
compression.enabled: true
servlet.jsp.registered: false
management:
endpoints.web.exposure.include: "*"
endpoint:
env.access: none
conditions.access: none
configprops.access: none
beans.access: none
caches.access: none
mappings.access: none
features.access: none
serviceregistry.access: none
scheduledtasks.access: none
health:
show-details: always
show-components: always
info:
os.enabled: true
env.enabled: true
git.enabled: false
process.enabled: true
health:
ssl.enabled: false
ping.enabled: false
eureka.enabled: false
refresh.enabled: false
eureka:
instance.hostname: ${HOSTNAME:localhost}
client:
enabled: true
fetch-registry: false
jersey.enabled: false
webclient.enabled: true
serviceUrl.defaultZone: http://localhost:8761/eureka
logging.level:
root: info
org.hibernate.validator.internal.util.Version: warn
application.yaml outside the JAR (config folder):
spring:
main.banner-mode: log
ldap:
username: ${LDAP_USERNAME}
password: ${LDAP_PASSWORD}
datasource:
username: ${DB_USERNAME}
password: ${DB_PASSWORD}
eureka.client.enabled: true
ibm.mq:
reconnect: "ANY" # See https://www.ibm.com/docs/en/ibm-mq/9.4.x?topic=objects-clientreconnectoptions
pool.enabled: true
channel: M.MQI.HIKU.DCD.13
user: ${MQ_USERNAME}
password: ${MQ_PASSWORD}
use-i-b-m-cipher-mappings: false
ssl-cipher-spec: TLS_AES_256_GCM_SHA384
logging:
file.name: ${logging.file.path}/monitoring-agent.log
logback.rollingpolicy:
max-history: 90
file-name-pattern: ${logging.file.path}/archive/monitoring-agent.%d{yyyy-MM-dd}.%i.log.gz
level:
root: info
com.netflix.eureka: off
com.netflix.discovery: off
org.hibernate.validator.internal.util.Version: warn
management:
health.diskspace.path: ${logging.file.path}
endpoint.logfile.external-file: ${logging.file.path}/server.err
application-qa.yaml (for the QA profile which is active):
spring:
eureka.client.service-url.defaultZone: https://foo/eureka
info.tags.environment: qa
Eureka server config
server.port: 8761
eureka:
environment: qa
server.wait-time-in-ms-when-sync-empty: 0
instance:
hostname: "zksr.${HOSTNAME}"
The registration works fine, though.
If I test this locally, I can see the following:
2025-09-10T08:05:14.436+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] o.s.b.w.embedded.netty.GracefulShutdown : Commencing graceful shutdown. Waiting for active requests to complete
2025-09-10T08:05:14.440+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [ netty-shutdown] o.s.b.w.embedded.netty.GracefulShutdown : Graceful shutdown complete
2025-09-10T08:05:14.441+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [foReplicator-%d] com.netflix.discovery.DiscoveryClient : DiscoveryClient_ZOOKEEPERS DEMO MONITORING AGENT/n50192.base.dom:Zookeepers Demo Monitoring Agent:8081 - registration status: 204
2025-09-10T08:05:16.517+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] com.netflix.discovery.DiscoveryClient : Shutting down DiscoveryClient ...
2025-09-10T08:05:19.522+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] com.netflix.discovery.DiscoveryClient : Unregistering ...
2025-09-10T08:05:19.526+02:00 WARN 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] io.netty.channel.AbstractChannel : Force-closing a channel whose registration task was not accepted by an event loop: [id: 0xed526e0f]
java.util.concurrent.RejectedExecutionException: event executor terminated
at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:934) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:353) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:346) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:836) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:827) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:817) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.register(AbstractChannel.java:482) ~[netty-transport-4.1.124.Final.jar!/:4.1.124.Final]
at reactor.netty.transport.TransportConnector.doInitAndRegister(TransportConnector.java:294) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.transport.TransportConnector.connect(TransportConnector.java:165) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.transport.TransportConnector.connect(TransportConnector.java:124) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(DefaultPooledConnectionProvider.java:547) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4576) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4641) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4542) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4478) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.drainLoop(SimpleDequePool.java:449) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.pendingOffer(SimpleDequePool.java:625) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.doAcquire(SimpleDequePool.java:306) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:425) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onSubscribe(DefaultPooledConnectionProvider.java:218) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool$QueueBorrowerMono.subscribe(SimpleDequePool.java:743) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:196) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:287) ~[reactor-netty-http-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:81) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:290) ~[reactor-netty-http-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4576) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.block(Mono.java:1778) ~[reactor-core-3.7.9.jar!/:3.7.9]
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78) ~[spring-cloud-netflix-eureka-client-4.3.0.jar!/:4.3.0]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:91) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900) ~[eureka-client-2.0.4.jar!/:2.0.4]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155) ~[spring-boot-3.5.5.jar!/:3.5.5]
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
2025-09-10T08:05:19.544+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8761/eureka/} exception=event executor terminated stacktrace=org.springframework.web.reactive.function.client.WebClientRequestException: event executor terminated
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException$9(ExchangeFunctions.java:137)
Suppressed: The stacktrace has been enhanced by Reactor, refer to additional information below:
Error has been observed at the following site(s):
*__checkpoint ? Request to DELETE http://localhost:8761/eureka/apps/ZOOKEEPERS%20DEMO%20MONITORING%20AGENT/n50192.base.dom%3AZookeepers%20Demo%20Monitoring%20Agent%3A8081 [DefaultWebClient]
Original Stack Trace:
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException$9(ExchangeFunctions.java:137)
at reactor.core.publisher.MonoErrorSupplied.subscribe(MonoErrorSupplied.java:55)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
at reactor.core.publisher.MonoNext$NextSubscriber.onError(MonoNext.java:93)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onError(MonoFlatMapMany.java:205)
at reactor.core.publisher.SerializedSubscriber.onError(SerializedSubscriber.java:124)
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.whenError(FluxRetryWhen.java:229)
at reactor.core.publisher.FluxRetryWhen$RetryWhenOtherSubscriber.onError(FluxRetryWhen.java:279)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onError(FluxContextWrite.java:121)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.maybeOnError(FluxConcatMapNoPrefetch.java:327)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onNext(FluxConcatMapNoPrefetch.java:212)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
at reactor.core.publisher.SinkManyEmitterProcessor.drain(SinkManyEmitterProcessor.java:476)
at reactor.core.publisher.SinkManyEmitterProcessor$EmitterInner.drainParent(SinkManyEmitterProcessor.java:620)
at reactor.core.publisher.FluxPublish$PubSubInner.request(FluxPublish.java:874)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.request(FluxContextWrite.java:136)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.request(FluxConcatMapNoPrefetch.java:337)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.request(FluxContextWrite.java:136)
at reactor.core.publisher.Operators$DeferredSubscription.request(Operators.java:1742)
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onError(FluxRetryWhen.java:196)
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:205)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect$ClientTransportSubscriber.onError(HttpClientConnect.java:325)
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:205)
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onError(DefaultPooledConnectionProvider.java:174)
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.fail(AbstractPool.java:479)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.lambda$drainLoop$9(SimpleDequePool.java:443)
at reactor.core.publisher.FluxDoOnEach$DoOnEachSubscriber.onError(FluxDoOnEach.java:186)
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:205)
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator$PooledConnectionInitializer.onError(DefaultPooledConnectionProvider.java:593)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:180)
at reactor.core.publisher.Operators.reportThrowInSubscribe(Operators.java:232)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:83)
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(DefaultPooledConnectionProvider.java:547)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4641)
at reactor.core.publisher.Mono.subscribe(Mono.java:4542)
at reactor.core.publisher.Mono.subscribe(Mono.java:4478)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.drainLoop(SimpleDequePool.java:449)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.pendingOffer(SimpleDequePool.java:625)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.doAcquire(SimpleDequePool.java:306)
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:425)
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onSubscribe(DefaultPooledConnectionProvider.java:218)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool$QueueBorrowerMono.subscribe(SimpleDequePool.java:743)
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:196)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:287)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:81)
at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:290)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.block(Mono.java:1778)
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:91)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919)
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126)
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116)
at java.base/java.lang.Thread.run(Thread.java:1583)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:104)
at reactor.core.publisher.Mono.block(Mono.java:1779)
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:91)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919)
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126)
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116)
at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.util.concurrent.RejectedExecutionException: event executor terminated
at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:934)
at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:353)
at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:346)
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:836)
at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:827)
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:817)
at reactor.netty.transport.TransportConnector$MonoChannelPromise.subscribe(TransportConnector.java:574)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(DefaultPooledConnectionProvider.java:547)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4641)
at reactor.core.publisher.Mono.subscribe(Mono.java:4542)
at reactor.core.publisher.Mono.subscribe(Mono.java:4478)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.drainLoop(SimpleDequePool.java:449)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.pendingOffer(SimpleDequePool.java:625)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.doAcquire(SimpleDequePool.java:306)
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:425)
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onSubscribe(DefaultPooledConnectionProvider.java:218)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool$QueueBorrowerMono.subscribe(SimpleDequePool.java:743)
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:196)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:287)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:81)
at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:290)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.block(Mono.java:1778)
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:91)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919)
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126)
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116)
at java.base/java.lang.Thread.run(Thread.java:1583)
2025-09-10T08:05:19.547+02:00 WARN 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failed with message: event executor terminated
2025-09-10T08:05:19.551+02:00 WARN 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] io.netty.channel.AbstractChannel : Force-closing a channel whose registration task was not accepted by an event loop: [id: 0x3c5dae6f]
java.util.concurrent.RejectedExecutionException: event executor terminated
at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:934) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:353) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:346) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:836) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:827) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:817) ~[netty-common-4.1.124.Final.jar!/:4.1.124.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.register(AbstractChannel.java:482) ~[netty-transport-4.1.124.Final.jar!/:4.1.124.Final]
at reactor.netty.transport.TransportConnector.doInitAndRegister(TransportConnector.java:294) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.transport.TransportConnector.connect(TransportConnector.java:165) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.transport.TransportConnector.connect(TransportConnector.java:124) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(DefaultPooledConnectionProvider.java:547) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4576) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4641) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4542) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4478) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.drainLoop(SimpleDequePool.java:449) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.pendingOffer(SimpleDequePool.java:625) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.doAcquire(SimpleDequePool.java:306) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:425) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onSubscribe(DefaultPooledConnectionProvider.java:218) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool$QueueBorrowerMono.subscribe(SimpleDequePool.java:743) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:196) ~[reactor-netty-core-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:287) ~[reactor-netty-http-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:81) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:290) ~[reactor-netty-http-1.2.9.jar!/:1.2.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.subscribe(Mono.java:4576) ~[reactor-core-3.7.9.jar!/:3.7.9]
at reactor.core.publisher.Mono.block(Mono.java:1778) ~[reactor-core-3.7.9.jar!/:3.7.9]
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78) ~[spring-cloud-netflix-eureka-client-4.3.0.jar!/:4.3.0]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:121) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:80) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900) ~[eureka-client-2.0.4.jar!/:2.0.4]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155) ~[spring-boot-3.5.5.jar!/:3.5.5]
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
2025-09-10T08:05:19.554+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8761/eureka/}, exception=event executor terminated stacktrace=org.springframework.web.reactive.function.client.WebClientRequestException: event executor terminated
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException$9(ExchangeFunctions.java:137)
Suppressed: The stacktrace has been enhanced by Reactor, refer to additional information below:
Error has been observed at the following site(s):
*__checkpoint ? Request to DELETE http://localhost:8761/eureka/apps/ZOOKEEPERS%20DEMO%20MONITORING%20AGENT/n50192.base.dom%3AZookeepers%20Demo%20Monitoring%20Agent%3A8081 [DefaultWebClient]
Original Stack Trace:
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException$9(ExchangeFunctions.java:137)
at reactor.core.publisher.MonoErrorSupplied.subscribe(MonoErrorSupplied.java:55)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
at reactor.core.publisher.MonoNext$NextSubscriber.onError(MonoNext.java:93)
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onError(MonoFlatMapMany.java:205)
at reactor.core.publisher.SerializedSubscriber.onError(SerializedSubscriber.java:124)
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.whenError(FluxRetryWhen.java:229)
at reactor.core.publisher.FluxRetryWhen$RetryWhenOtherSubscriber.onError(FluxRetryWhen.java:279)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onError(FluxContextWrite.java:121)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.maybeOnError(FluxConcatMapNoPrefetch.java:327)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onNext(FluxConcatMapNoPrefetch.java:212)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
at reactor.core.publisher.SinkManyEmitterProcessor.drain(SinkManyEmitterProcessor.java:476)
at reactor.core.publisher.SinkManyEmitterProcessor$EmitterInner.drainParent(SinkManyEmitterProcessor.java:620)
at reactor.core.publisher.FluxPublish$PubSubInner.request(FluxPublish.java:874)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.request(FluxContextWrite.java:136)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.request(FluxConcatMapNoPrefetch.java:337)
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.request(FluxContextWrite.java:136)
at reactor.core.publisher.Operators$DeferredSubscription.request(Operators.java:1742)
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onError(FluxRetryWhen.java:196)
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:205)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect$ClientTransportSubscriber.onError(HttpClientConnect.java:325)
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:205)
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onError(DefaultPooledConnectionProvider.java:174)
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.fail(AbstractPool.java:479)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.lambda$drainLoop$9(SimpleDequePool.java:443)
at reactor.core.publisher.FluxDoOnEach$DoOnEachSubscriber.onError(FluxDoOnEach.java:186)
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:205)
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator$PooledConnectionInitializer.onError(DefaultPooledConnectionProvider.java:593)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:180)
at reactor.core.publisher.Operators.reportThrowInSubscribe(Operators.java:232)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:83)
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(DefaultPooledConnectionProvider.java:547)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4641)
at reactor.core.publisher.Mono.subscribe(Mono.java:4542)
at reactor.core.publisher.Mono.subscribe(Mono.java:4478)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.drainLoop(SimpleDequePool.java:449)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.pendingOffer(SimpleDequePool.java:625)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.doAcquire(SimpleDequePool.java:306)
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:425)
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onSubscribe(DefaultPooledConnectionProvider.java:218)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool$QueueBorrowerMono.subscribe(SimpleDequePool.java:743)
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:196)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:287)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:81)
at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:290)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.block(Mono.java:1778)
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:121)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:80)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919)
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126)
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116)
at java.base/java.lang.Thread.run(Thread.java:1583)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:104)
at reactor.core.publisher.Mono.block(Mono.java:1779)
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:121)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:80)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919)
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126)
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116)
at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.util.concurrent.RejectedExecutionException: event executor terminated
at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:934)
at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:353)
at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:346)
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:836)
at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:827)
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:817)
at reactor.netty.transport.TransportConnector$MonoChannelPromise.subscribe(TransportConnector.java:574)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(DefaultPooledConnectionProvider.java:547)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4641)
at reactor.core.publisher.Mono.subscribe(Mono.java:4542)
at reactor.core.publisher.Mono.subscribe(Mono.java:4478)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.drainLoop(SimpleDequePool.java:449)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.pendingOffer(SimpleDequePool.java:625)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.doAcquire(SimpleDequePool.java:306)
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:425)
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onSubscribe(DefaultPooledConnectionProvider.java:218)
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool$QueueBorrowerMono.subscribe(SimpleDequePool.java:743)
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:196)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:287)
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:61)
at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:81)
at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63)
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:290)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoDeferContextual.subscribe(MonoDeferContextual.java:55)
at reactor.core.publisher.Mono.subscribe(Mono.java:4576)
at reactor.core.publisher.Mono.block(Mono.java:1778)
at org.springframework.cloud.netflix.eureka.http.WebClientEurekaHttpClient.cancel(WebClientEurekaHttpClient.java:78)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:121)
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:80)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74)
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76)
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71)
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919)
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239)
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126)
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116)
at java.base/java.lang.Thread.run(Thread.java:1583)
2025-09-10T08:05:19.560+02:00 WARN 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failed with message: event executor terminated
2025-09-10T08:05:19.560+02:00 ERROR 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] com.netflix.discovery.DiscoveryClient : DiscoveryClient_ZOOKEEPERS DEMO MONITORING AGENT/n50192.base.dom:Zookeepers Demo Monitoring Agent:8081 - de-registration failedCannot execute request on any known server
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$2.execute(EurekaHttpClientDecorator.java:74) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:76) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.cancel(EurekaHttpClientDecorator.java:71) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.unregister(DiscoveryClient.java:919) ~[eureka-client-2.0.4.jar!/:2.0.4]
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:900) ~[eureka-client-2.0.4.jar!/:2.0.4]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:415) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:239) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:202) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:798) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:748) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1481) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:707) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1474) ~[spring-beans-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1219) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1180) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.doClose(ReactiveWebServerApplicationContext.java:155) ~[spring-boot-3.5.5.jar!/:3.5.5]
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1126) ~[spring-context-6.2.10.jar!/:6.2.10]
at org.springframework.boot.SpringApplicationShutdownHook.closeAndWait(SpringApplicationShutdownHook.java:147) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
at org.springframework.boot.SpringApplicationShutdownHook.run(SpringApplicationShutdownHook.java:116) ~[spring-boot-3.5.5.jar!/:3.5.5]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
2025-09-10T08:05:19.561+02:00 INFO 6660 --- [Zookeepers Demo Monitoring Agent] [ionShutdownHook] com.netflix.discovery.DiscoveryClient : Completed shut down of DiscoveryClient
My local configuration is, for the client:
spring:
main.keep-alive: true
threads.virtual.enabled: true
application.name: Zookeepers Demo Monitoring Agent
cloud:
refresh.enabled: false
discovery.client.health-indicator.enabled: false
server:
port: 8081
http2.enabled: true
compression.enabled: true
servlet.jsp.registered: false
management:
endpoints.web.exposure.include: "*"
endpoint:
env.access: none
conditions.access: none
configprops.access: none
beans.access: none
caches.access: none
mappings.access: none
features.access: none
serviceregistry.access: none
health:
show-details: always
show-components: always
info:
os.enabled: true
git.enabled: false # We don't want to have the Git info of the agent itself
env.enabled: true
process.enabled: true
health:
ssl.enabled: false
eureka.enabled: false
refresh.enabled: false
eureka:
instance.hostname: ${HOSTNAME:localhost}
client:
jersey.enabled: true
webclient.enabled: true
fetch-registry: false
serviceUrl.defaultZone: http://localhost:8761/eureka
logging.level:
root: info
org.hibernate.validator.internal.util.Version: warn
info.tags.environment: local
while, for the server:
spring:
main.keep-alive: true
cloud.refresh.enabled: false
threads.virtual.enabled: true
application.name: Zookeepers Service Registry
server:
port: ${ZKSR_SERVER_PORT:8761}
http2.enabled: true
compression.enabled: true
servlet.jsp.registered: false
management.endpoint.health:
show-components: always
show-details: always
management.health:
# We have no TLS key material to monitor
ssl.enabled: false
# Useless since the whole refresh scope is disabled due to AOT
refresh.enabled: false
eureka:
instance.hostname: ${HOSTNAME:localhost}
server:
batch-replication: true
enable-replicated-request-compression: true
client:
jersey.enabled: false
fetch-registry: false
register-with-eureka: false
serviceUrl.defaultZone: http://${eureka.instance.hostname}:${server.port}/${server.servlet.context-path:}/eureka
logging.level:
root: info
com.netflix.eureka: warn
com.netflix.discovery: warn
org.hibernate.validator.internal.util.Version: warn
The issue seems to be caused by the WebClient only. If I change the configuration of the client to use the RestClient the issue doesn't occur.