Index 12 out of bounds for length 12

[janyyy]

ERROR_INFO

com.sengi.exception.ThrowableMapper [ThrowableMapper.java : 25] java.lang.IndexOutOfBoundsException: Index 12 out of bounds for length 12 at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) at java.base/java.util.Objects.checkIndex(Objects.java:359) at java.base/java.util.ArrayList.get(ArrayList.java:427) at io.quarkus.eureka.client.loadBalancer.RoundRobin.getHomeUrl(RoundRobin.java:57) at io.quarkus.eureka.client.EurekaClient.app(EurekaClient.java:38) at com.sengi.rest.RedisRestClientService.hGetAll(RedisRestClientService.java:60) at com.sengi.rest.RedisRestClientService_ClientProxy.hGetAll(Unknown Source) at com.sengi.service.impl.AuthServiceImpl.checkAuth(AuthServiceImpl.java:40) at com.sengi.service.impl.AuthServiceImpl_ClientProxy.checkAuth(Unknown Source) at com.sengi.resource.TrackingSearchResource.customerTrackingSearch(TrackingSearchResource.java:49) at jdk.internal.reflect.GeneratedMethodAccessor51.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:170) at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:130) at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:660) at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:524) at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$2(ResourceMethodInvoker.java:474) at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364) at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:476) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:434) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:408) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:69) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:492) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:261) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:161) at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364) at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:164) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:247) at io.quarkus.resteasy.runtime.standalone.RequestDispatcher.service(RequestDispatcher.java:73) at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.dispatch(VertxRequestHandler.java:151) at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler$1.run(VertxRequestHandler.java:91) at io.quarkus.vertx.core.runtime.VertxCoreRecorder$14.runWith(VertxCoreRecorder.java:564) at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2449) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1478) at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29) at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.base/java.lang.Thread.run(Thread.java:833)

ERROR_CODE

public Optional<String> getHomeUrl(String appId) { String target = null; try { List<String> urlList = cache.get(appId); if (!urlList.isEmpty()) { if (position.intValue() > urlList.size() - 1) { position.set(0); } target = urlList.get(position.getAndIncrement()); logger.info("Target from RoundRobin LB is: " + target); } } catch (ExecutionException e) { e.printStackTrace(); } return Optional.ofNullable(target); }

FIXED_CODE

public Optional<String> getHomeUrl(String appId) { String target = null; try { List<String> urlList = cache.get(appId); if (!urlList.isEmpty()) { synchronized (position) { if (position.intValue() >= urlList.size()) { position.set(0); } target = urlList.get(position.getAndIncrement() % urlList.size()); } logger.info("Target from RoundRobin LB is: " + target); } } catch (ExecutionException e) { e.printStackTrace(); } return Optional.ofNullable(target); }