JBoss - Java heap retention in session cache DefaultDataContainer after session listener exceptions

Solution Unverified - Updated 14 Jun 2024

Environment

JBoss Enterprise Application Platform (EAP) 7.x

Issue

We see exceptions during session destruction from a session listener and after enough such exceptions an OutOfMemoryError is eventually reached with heap consumed by many org.infinispan.container.entries.ImmortalCacheEntrys in a org.infinispan.container.impl.DefaultDataContainer session cache

WARN  [org.wildfly.clustering.web.infinispan] (SessionExpirationScheduler - 1) WFLYCLWEBINF0004: Failed to expire session ypieHzHp1gCnVEibsm_ZiYShDaLggbRmYBpa65re: java.lang.RuntimeException: java.lang.NullPointerException
	at io.undertow.servlet//io.undertow.servlet.core.SessionListenerBridge.sessionDestroyed(SessionListenerBridge.java:75)
	at io.undertow.core@2.0.30.SP2-redhat-00001//io.undertow.server.session.SessionListeners.sessionDestroyed(SessionListeners.java:61)
	at org.wildfly.clustering.web.undertow@7.2.8.GA-redhat-00002//org.wildfly.clustering.web.undertow.session.UndertowSessionExpirationListener.sessionExpired(UndertowSessionExpirationListener.java:56)
	at org.wildfly.clustering.web.infinispan@7.2.8.GA-redhat-00002//org.wildfly.clustering.web.infinispan.session.ExpiredSessionRemover.remove(ExpiredSessionRemover.java:61)
	at org.wildfly.clustering.web.infinispan@7.2.8.GA-redhat-00002//org.wildfly.clustering.web.infinispan.session.ExpiredSessionRemover.remove(ExpiredSessionRemover.java:40)
	at org.wildfly.clustering.web.infinispan@7.2.8.GA-redhat-00002//org.wildfly.clustering.web.infinispan.session.SessionExpirationScheduler$ExpirationTask.run(SessionExpirationScheduler.java:149)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
	at org.jboss.threads@2.3.3.Final-redhat-00001//org.jboss.threads.JBossThread.run(JBossThread.java:485)
Caused by: java.lang.NullPointerException
	at deployment.02721921.war//com.listeners.CustomHttpSessionListener.sessionDestroyed(CustomHttpSessionListener.java:28)
	at io.undertow.servlet//io.undertow.servlet.core.ApplicationListeners.sessionDestroyed(ApplicationListeners.java:328)
	at io.undertow.servlet//io.undertow.servlet.core.SessionListenerBridge.doDestroy(SessionListenerBridge.java:98)
	at io.undertow.servlet//io.undertow.servlet.core.SessionListenerBridge.access$000(SessionListenerBridge.java:41)
	at io.undertow.servlet//io.undertow.servlet.core.SessionListenerBridge$1.call(SessionListenerBridge.java:54)
	at io.undertow.servlet//io.undertow.servlet.core.SessionListenerBridge$1.call(SessionListenerBridge.java:51)
	at io.undertow.servlet//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
	at io.undertow.servlet//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
	at org.wildfly.extension.undertow@7.2.8.GA-redhat-00002//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
	at org.wildfly.extension.undertow@7.2.8.GA-redhat-00002//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@7.2.8.GA-redhat-00002//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@7.2.8.GA-redhat-00002//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@7.2.8.GA-redhat-00002//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at io.undertow.servlet//io.undertow.servlet.core.SessionListenerBridge.sessionDestroyed(SessionListenerBridge.java:73)
	... 12 more

Resolution

Fix any exceptions raised from session listeners
Remove the <distributable/> flag from your application WEB-INF/web.xml to disable the distributable cache as a workaround
Update to EAP 7.3.4+

Root Cause

A session listener is throwing an exception. This interrupts and prevents needed session clean up tasks, resulting in a leak.
This content is not included.UNDERTOW-1773
This content is not included.JBEAP-20116

SBR

Product(s)

Red Hat JBoss Enterprise Application Platform

Components

jbossas

Category

Troubleshoot

Tags

This solution is part of Red Hat’s fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our customers. To give you the knowledge you need the instant it becomes available, these articles may be presented in a raw and unedited form.