Missing Maven Prometheus dependency in 5.1.0

[DavideRossi]

Version

5.1.0

What happened?

I have a Helidon MP-based app that uses an embedded Fuseki instance. My pom.xml contains:

<dependency>
  <groupId>org.apache.jena</groupId>
  <artifactId>apache-jena-libs</artifactId>
  <type>pom</type>
  <version>${jena.version}</version>
<dependency>
<dependency>
  <groupId>org.apache.jena</groupId>
  <artifactId>jena-fuseki-main</artifactId>
  <version>${jena.version}</version>
<dependency>

where jena.version is 5.1.0. As soon as my code executes DatasetFactory.createTxnMem() it crashes with a java.lang.NoClassDefFoundError: io/micrometer/prometheusmetrics/PrometheusMeterRegistry exception. The code works just fine with previous Jena/Fuseki versions. Maybe a missing Prometheus dependency?

Relevant output and stacktrace

2024.08.27 19:10:04 WARNING org.glassfish.jersey.server.ServerRuntime$Responder VirtualThread[#51,[0x3c1d1ea1 0x2cee3b67] WebServer socket]/runnable@ForkJoinPool-1-worker-1: An exception mapping did not successfully produce and processed a response. Logging the exception propagated to the default exception mapper.
java.lang.NoClassDefFoundError: io/micrometer/prometheusmetrics/PrometheusMeterRegistry
	at org.apache.jena.fuseki.metrics.prometheus.InitPrometheus.start(InitPrometheus.java:27)
	at org.apache.jena.base.module.Subsystem.lambda$initialize$1(Subsystem.java:117)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at org.apache.jena.base.module.Subsystem.forEach(Subsystem.java:193)
	at org.apache.jena.base.module.Subsystem.forEach(Subsystem.java:169)
	at org.apache.jena.base.module.Subsystem.initialize(Subsystem.java:115)
	at org.apache.jena.sys.JenaSystem.init(JenaSystem.java:89)
	at org.apache.jena.sparql.core.DatasetGraphFactory.<clinit>(DatasetGraphFactory.java:34)
	at org.apache.jena.query.DatasetFactory.createTxnMem(DatasetFactory.java:69)
	at net.morcilab.wot.wt.resources.ThingsResource.retrieveThingById(ThingsResource.java:65)
	at net.morcilab.wot.wt.resources.ThingsResource$Proxy$_$$_WeldClientProxy.retrieveThingById(Unknown Source)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:146)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:189)
	at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:176)
	at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:93)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:478)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:400)
	at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
	at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:274)
	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
	at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
	at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
	at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:266)
	at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:253)
	at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:696)
	at io.helidon.microprofile.server.JaxRsService.doHandle(JaxRsService.java:228)
	at io.helidon.microprofile.server.JaxRsService.lambda$handle$2(JaxRsService.java:185)
	at io.helidon.common.context.Contexts.runInContext(Contexts.java:117)
	at io.helidon.microprofile.server.JaxRsService.handle(JaxRsService.java:185)
	at io.helidon.webserver.http.HttpRoutingImpl$RoutingExecutor.doRoute(HttpRoutingImpl.java:165)
	at io.helidon.webserver.http.HttpRoutingImpl$RoutingExecutor.call(HttpRoutingImpl.java:124)
	at io.helidon.webserver.http.HttpRoutingImpl$RoutingExecutor.call(HttpRoutingImpl.java:102)
	at io.helidon.webserver.http.ErrorHandlers.runWithErrorHandling(ErrorHandlers.java:76)
	at io.helidon.webserver.http.Filters$FilterChainImpl.proceed(Filters.java:121)
	at io.helidon.webserver.observe.metrics.MetricsFeature.lambda$configureVendorMetrics$2(MetricsFeature.java:90)
	at io.helidon.webserver.http.Filters$FilterChainImpl.proceed(Filters.java:119)
	at io.helidon.common.context.Contexts.runInContext(Contexts.java:117)
	at io.helidon.webserver.context.ContextRoutingFeature.filter(ContextRoutingFeature.java:50)
	at io.helidon.webserver.http.Filters$FilterChainImpl.proceed(Filters.java:119)
	at io.helidon.webserver.http.Filters.executeFilters(Filters.java:87)
	at io.helidon.webserver.http.Filters.lambda$filter$0(Filters.java:83)
	at io.helidon.webserver.http.ErrorHandlers.runWithErrorHandling(ErrorHandlers.java:76)
	at io.helidon.webserver.http.Filters.filter(Filters.java:83)
	at io.helidon.webserver.http.HttpRoutingImpl.route(HttpRoutingImpl.java:73)
	at io.helidon.webserver.http1.Http1Connection.route(Http1Connection.java:356)
	at io.helidon.webserver.http1.Http1Connection.handle(Http1Connection.java:194)
	at io.helidon.webserver.ConnectionHandler.run(ConnectionHandler.java:165)
	at io.helidon.common.task.InterruptableTask.call(InterruptableTask.java:47)
	at io.helidon.webserver.ThreadPerTaskExecutor$ThreadBoundFuture.run(ThreadPerTaskExecutor.java:239)
	at java.base/java.lang.VirtualThread.run(VirtualThread.java:329)
Caused by: java.lang.ClassNotFoundException: io.micrometer.prometheusmetrics.PrometheusMeterRegistry
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	... 55 more

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