Memoryleak in Metrics-Endpoint ------------------------------ Key: WFLY-12504 URL: https://issues.redhat.com/browse/WFLY-12504 Project: WildFly Issue Type: Bug Components: MP Metrics Affects Versions: 17.0.1.Final Environment: Docker Image jboss/keycloak:6.0.1 Reporter: Mathias Werlitz Assignee: Richard Opalka Priority: Blocker Labels: blocker-WF18, fixed_needs_core Fix For: 18.0.0.Final Attachments: Screen Shot 2019-09-07 at 7.27.24 AM.png, Screen Shot 2019-09-07 at 7.29.02 AM.png I noticed there seems to be a memory leak when calling the /metrics endpoint (with Prometheus). I don't know if this relates to the Keycloak metrics or the general Wildfly base metrics. Every request to /metrics seems to consume some more heap memory until a OOME occurs. No other requests are done. If the metrics endpoint isn't used at all the server works fine. {noformat} 15:14:50,951 ERROR [org.jboss.as.controller.management-operation] (DeploymentScanner-threads - 1) WFLYCTL0013: Operation ("read-attribute") failed - address: ([("deployment" => "keycloak-server.war")]): java.lang.OutOfMemoryError: GC overhead limit exceeded at java.util.HashMap.resize(HashMap.java:704) at java.util.HashMap.putVal(HashMap.java:629) at java.util.HashMap.put(HashMap.java:612) at java.util.HashSet.add(HashSet.java:220) at org.jboss.as.controller.PathAddress.pathAddress(PathAddress.java:95) at org.jboss.as.controller.AbstractOperationContext$OperationId.<init>(AbstractOperationContext.java:1571) at org.jboss.as.controller.OperationContextImpl.authorize(OperationContextImpl.java:1326) at org.jboss.as.controller.OperationContextImpl.authorize(OperationContextImpl.java:1321) at org.jboss.as.controller.operations.global.ReadAttributeHandler$AuthorizeAttributeReadHandler.doExecuteInternal(ReadAttributeHandler.java:244) at org.jboss.as.controller.operations.global.ReadAttributeHandler$AuthorizeAttributeReadHandler.execute(ReadAttributeHandler.java:229) at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:999) at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:743) at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:467) at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1412) at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:423) at org.jboss.as.controller.ModelControllerImpl.lambda$execute$1(ModelControllerImpl.java:243) at org.jboss.as.controller.ModelControllerImpl$$Lambda$553/974545249.run(Unknown Source) at org.wildfly.security.auth.server.SecurityIdentity$$Lambda$554/2003274744.run(Unknown Source) at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:289) at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:255) at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:243) at org.jboss.as.controller.ModelControllerClientFactoryImpl$LocalClient$$Lambda$552/516471669.apply(Unknown Source) at org.jboss.as.controller.ModelControllerClientFactoryImpl$LocalClient.executeInModelControllerCl(ModelControllerClientFactoryImpl.java:259) at org.jboss.as.controller.ModelControllerClientFactoryImpl$LocalClient.executeOperation(ModelControllerClientFactoryImpl.java:157) at org.jboss.as.controller.ModelControllerClientFactoryImpl$1$$Lambda$546/98454422.apply(Unknown Source) at org.jboss.as.controller.ModelControllerClientFactoryImpl.lambda$executeInVm$0(ModelControllerClientFactoryImpl.java:351) at org.jboss.as.controller.ModelControllerClientFactoryImpl$$Lambda$550/226565561.run(Unknown Source) at org.jboss.as.controller.access.InVmAccess.runInVm(InVmAccess.java:85) at org.jboss.as.controller.ModelControllerClientFactoryImpl.executeInVm(ModelControllerClientFactoryImpl.java:351) at org.jboss.as.controller.ModelControllerClientFactoryImpl.access$000(ModelControllerClientFactoryImpl.java:59) at org.jboss.as.controller.ModelControllerClientFactoryImpl$1.executeOperation(ModelControllerClientFactoryImpl.java:82) at org.jboss.as.controller.LocalModelControllerClient.execute(LocalModelControllerClient.java:54) 15:14:50,955 ERROR [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 1) WFLYDS0012: Scan of /opt/jboss/keycloak/standalone/deployments threw Exception: java.lang.RuntimeException: WFLYDS0036: Deployment model operation failed. undefined at org.jboss.as.server.deployment.scanner.DefaultDeploymentOperations.getUnrelatedDeployments(DefaultDeploymentOperations.java:109) at org.jboss.as.server.deployment.scanner.FileSystemDeploymentService$ScanContext.<init>(FileSystemDeploymentService.java:1692) at org.jboss.as.server.deployment.scanner.FileSystemDeploymentService$ScanContext.<init>(FileSystemDeploymentService.java:1640) at org.jboss.as.server.deployment.scanner.FileSystemDeploymentService.scan(FileSystemDeploymentService.java:589) at org.jboss.as.server.deployment.scanner.FileSystemDeploymentService.scan(FileSystemDeploymentService.java:493) at org.jboss.as.server.deployment.scanner.FileSystemDeploymentService$DeploymentScanRunnable.run(FileSystemDeploymentService.java:255) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) at org.jboss.threads.JBossThread.run(JBossThread.java:485) 15:14:52,319 ERROR [org.jboss.as.controller.management-operation] (management I/O-1) WFLYCTL0013: Operation ("read-attribute") failed - address: ([ ("subsystem" => "jgroups"), ("channel" => "ee"), ("protocol" => "pbcast.NAKACK2") ]): java.lang.OutOfMemoryError: GC overhead limit exceeded at sun.reflect.generics.parser.SignatureParser.parsePackageNameAndSimpleClassTypeSignature(SignatureParser.java:331) at sun.reflect.generics.parser.SignatureParser.parseClassTypeSignature(SignatureParser.java:310) at sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature(SignatureParser.java:289) at sun.reflect.generics.parser.SignatureParser.parseFieldTypeSignature(SignatureParser.java:283) at sun.reflect.generics.parser.SignatureParser.parseTypeSignature(SignatureParser.java:485) at sun.reflect.generics.parser.SignatureParser.parseTypeSig(SignatureParser.java:188) at sun.reflect.annotation.AnnotationParser.parseSig(AnnotationParser.java:436) at sun.reflect.annotation.AnnotationParser.parseAnnotation2(AnnotationParser.java:241) at sun.reflect.annotation.AnnotationParser.parseAnnotations2(AnnotationParser.java:120) at sun.reflect.annotation.AnnotationParser.parseAnnotations(AnnotationParser.java:72) at java.lang.reflect.Field.declaredAnnotations(Field.java:1150) at java.lang.reflect.Field.declaredAnnotations(Field.java:1148) at java.lang.reflect.Field.getAnnotation(Field.java:1120) at org.jgroups.stack.Configurator.resolveAndAssignField(Configurator.java:926) at org.jgroups.stack.Configurator.resolveAndAssignFields(Configurator.java:921) at org.jgroups.stack.Protocol.setProperties(Protocol.java:133) at org.jboss.as.clustering.jgroups.subsystem.AbstractProtocolConfigurationServiceConfigurator.lambda$createProtocol$0(AbstractProtocolConfigurationServiceConfigurator.java:119) at org.jboss.as.clustering.jgroups.subsystem.AbstractProtocolConfigurationServiceConfigurator$$Lambda$590/1559509553.run(Unknown Source) at org.wildfly.security.manager.WildFlySecurityManager.doUnchecked(WildFlySecurityManager.java:849) at org.jboss.as.clustering.jgroups.subsystem.AbstractProtocolConfigurationServiceConfigurator.createProtocol(AbstractProtocolConfigurationServiceConfigurator.java:125) at org.jboss.as.clustering.jgroups.subsystem.ChannelRuntimeResourceRegistration.findProtocol(ChannelRuntimeResourceRegistration.java:87) at org.jboss.as.clustering.jgroups.subsystem.ProtocolMetricsHandler.executeRuntimeStep(ProtocolMetricsHandler.java:244) at org.jboss.as.controller.AbstractRuntimeOnlyHandler$1.execute(AbstractRuntimeOnlyHandler.java:59) at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:999) at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:743) at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:467) at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1412) at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:423) at org.jboss.as.controller.ModelControllerImpl.lambda$execute$1(ModelControllerImpl.java:243) at org.jboss.as.controller.ModelControllerImpl$$Lambda$553/974545249.run(Unknown Source) at org.wildfly.security.auth.server.SecurityIdentity$$Lambda$554/2003274744.run(Unknown Source) at org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:289) 15:14:52,322 ERROR [io.undertow.request] (management I/O-1) UT005071: Undertow request failed HttpServerExchange{ GET /metrics request {Accept=[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8], Connection=[keep-alive], Accept-Language=[de,en-US;q=0.7,en;q=0.3], Cache-Control=[max-age=0], Accept-Encoding=[gzip, deflate], User-Agent=[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0], Upgrade-Insecure-Requests=[1], Host=[192.168.99.100:9990]} response {Access-Control-Allow-Origin=[*], Access-Control-Allow-Headers=[origin, content-type, accept, authorization], Access-Control-Allow-Credentials=[true], Content-Type=[text/plain], Access-Control-Allow-Methods=[GET, POST, PUT, DELETE, OPTIONS, HEAD], Access-Control-Max-Age=[1209600]}}: java.lang.IllegalStateException: WFLYMETRICS0003: Unable to read attribute xmit_table_num_purges on [ ("subsystem" => "jgroups"), ("channel" => "ee"), ("protocol" => "pbcast.NAKACK2") ]: "WFLYCTL0158: Operation handler failed: java.lang.OutOfMemoryError: GC overhead limit exceeded". at org.wildfly.extension.microprofile.metrics.MetricCollector.lambda$collectResourceMetrics0$0(MetricCollector.java:143) at org.wildfly.extension.microprofile.metrics.PrometheusCollector.collect(PrometheusCollector.java:51) at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.findNextElement(CollectorRegistry.java:183) at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.<init>(CollectorRegistry.java:147) at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.<init>(CollectorRegistry.java:168) at io.prometheus.client.CollectorRegistry.metricFamilySamples(CollectorRegistry.java:130) at org.wildfly.extension.microprofile.metrics.MetricsContextService$1.handleRequest(MetricsContextService.java:100) at org.jboss.as.domain.http.server.security.RealmReadinessHandler.handleRequest(RealmReadinessHandler.java:51) at org.jboss.as.domain.http.server.security.ServerErrorReadinessHandler.handleRequest(ServerErrorReadinessHandler.java:35) at io.undertow.server.handlers.PathHandler.handleRequest(PathHandler.java:91) at io.undertow.server.handlers.ChannelUpgradeHandler.handleRequest(ChannelUpgradeHandler.java:211) at io.undertow.server.handlers.cache.CacheHandler.handleRequest(CacheHandler.java:92) at io.undertow.server.handlers.error.SimpleErrorPageHandler.handleRequest(SimpleErrorPageHandler.java:78) at io.undertow.server.handlers.CanonicalPathHandler.handleRequest(CanonicalPathHandler.java:49) at org.jboss.as.domain.http.server.ManagementHttpRequestHandler.handleRequest(ManagementHttpRequestHandler.java:57) at org.jboss.as.domain.http.server.cors.CorsHttpHandler.handleRequest(CorsHttpHandler.java:75) at org.jboss.as.domain.http.server.ManagementHttpServer$UpgradeFixHandler.handleRequest(ManagementHttpServer.java:662) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:364) at io.undertow.server.protocol.http.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:255) at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136) at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:59) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66) at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89) at org.xnio.nio.WorkerThread.run(WorkerThread.java:591) 15:14:58,673 ERROR [org.jboss.as.controller.management-operation] (management I/O-2) WFLYCTL0013: Operation ("read-attribute") failed - address: ([ ("subsystem" => "jgroups"), ("channel" => "ee"), ("protocol" => "UDP") ]): java.lang.OutOfMemoryError: GC overhead limit exceeded 15:14:58,675 ERROR [io.undertow.request] (management I/O-2) UT005071: Undertow request failed HttpServerExchange{ GET /metrics request {Accept=[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8], Connection=[keep-alive], Accept-Language=[de,en-US;q=0.7,en;q=0.3], Cache-Control=[max-age=0], Accept-Encoding=[gzip, deflate], User-Agent=[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0], Upgrade-Insecure-Requests=[1], Host=[192.168.99.100:9990]} response {Access-Control-Allow-Origin=[*], Access-Control-Allow-Headers=[origin, content-type, accept, authorization], Access-Control-Allow-Credentials=[true], Content-Type=[text/plain], Access-Control-Allow-Methods=[GET, POST, PUT, DELETE, OPTIONS, HEAD], Access-Control-Max-Age=[1209600]}}: java.lang.IllegalStateException: WFLYMETRICS0003: Unable to read attribute max_bundle_size on [ ("subsystem" => "jgroups"), ("channel" => "ee"), ("protocol" => "UDP") ]: "WFLYCTL0158: Operation handler failed: java.lang.OutOfMemoryError: GC overhead limit exceeded". at org.wildfly.extension.microprofile.metrics.MetricCollector.lambda$collectResourceMetrics0$0(MetricCollector.java:143) at org.wildfly.extension.microprofile.metrics.PrometheusCollector.collect(PrometheusCollector.java:51) at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.findNextElement(CollectorRegistry.java:183) at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.<init>(CollectorRegistry.java:147) at io.prometheus.client.CollectorRegistry$MetricFamilySamplesEnumeration.<init>(CollectorRegistry.java:168) at io.prometheus.client.CollectorRegistry.metricFamilySamples(CollectorRegistry.java:130) at org.wildfly.extension.microprofile.metrics.MetricsContextService$1.handleRequest(MetricsContextService.java:100) at org.jboss.as.domain.http.server.security.RealmReadinessHandler.handleRequest(RealmReadinessHandler.java:51) at org.jboss.as.domain.http.server.security.ServerErrorReadinessHandler.handleRequest(ServerErrorReadinessHandler.java:35) at io.undertow.server.handlers.PathHandler.handleRequest(PathHandler.java:91) at io.undertow.server.handlers.ChannelUpgradeHandler.handleRequest(ChannelUpgradeHandler.java:211) at io.undertow.server.handlers.cache.CacheHandler.handleRequest(CacheHandler.java:92) at io.undertow.server.handlers.error.SimpleErrorPageHandler.handleRequest(SimpleErrorPageHandler.java:78) at io.undertow.server.handlers.CanonicalPathHandler.handleRequest(CanonicalPathHandler.java:49) at org.jboss.as.domain.http.server.ManagementHttpRequestHandler.handleRequest(ManagementHttpRequestHandler.java:57) at org.jboss.as.domain.http.server.cors.CorsHttpHandler.handleRequest(CorsHttpHandler.java:75) at org.jboss.as.domain.http.server.ManagementHttpServer$UpgradeFixHandler.handleRequest(ManagementHttpServer.java:662) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:364) at io.undertow.server.protocol.http.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:255) at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136) at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:162) at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:100) at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:57) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:291) at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:286) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.nio.QueuedNioTcpServer$1.run(QueuedNioTcpServer.java:131) at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612) at org.xnio.nio.WorkerThread.run(WorkerThread.java:479) {noformat}