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  1. JBoss Enterprise Application Platform
  2. JBEAP-15777

[GSS](7.2.z) Shutdown hangs if WAR is distributable and uses SSE

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      I have an application (WAR) that uses server-sent events (as standardized in JAX-RS 2.1). The application is also marked as <distributable/> in web.xml. If anything actually opens a SSE channel, WildFly hangs during shutdown.

      The culprit appears to be DistributableSessionManager. See the below thread dump, taken during a hung shutdown. DSM is coded to wait up to getDefaultMaxInactiveInterval() seconds in its stop() method, and the default is 30 minutes unless configured otherwise. That's why shutdown hangs, although I don't know what it's waiting for.

      If I remove <distributable/> from web.xml, shutdown happens normally.

      "ServerService Thread Pool -- 45" #154 prio=5 os_prio=0 tid=0x000000002bc1a800 nid=0x115e8 waiting on condition [0x0000000035c5e000]
         java.lang.Thread.State: TIMED_WAITING (parking)
              at sun.misc.Unsafe.park(Native Method)
              - parking to wait for  <0x00000000fb4bcc98> (a java.util.concurrent.locks.StampedLock)
              at java.util.concurrent.locks.StampedLock.acquireWrite(StampedLock.java:1119)
              at java.util.concurrent.locks.StampedLock.tryWriteLock(StampedLock.java:394)
              at org.wildfly.clustering.web.undertow.session.DistributableSessionManager.stop(DistributableSessionManager.java:98)
              - locked <0x00000000fb446c70> (a org.wildfly.clustering.web.undertow.session.DistributableSessionManager)
              at io.undertow.servlet.core.DeploymentManagerImpl$3.call(DeploymentManagerImpl.java:617)
              at io.undertow.servlet.core.DeploymentManagerImpl$3.call(DeploymentManagerImpl.java:607)
              at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
              at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$920/1245185678.call(Unknown Source)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$920/1245185678.call(Unknown Source)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$920/1245185678.call(Unknown Source)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$920/1245185678.call(Unknown Source)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1502)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$920/1245185678.call(Unknown Source)
              at io.undertow.servlet.core.DeploymentManagerImpl.stop(DeploymentManagerImpl.java:621)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.stopContext(UndertowDeploymentService.java:135)
              at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$2.run(UndertowDeploymentService.java:117)
              at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
              at java.util.concurrent.FutureTask.run(FutureTask.java:266)
              at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
              at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
              at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
              at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
              at java.lang.Thread.run(Thread.java:748)
              at org.jboss.threads.JBossThread.run(JBossThread.java:485)
      
         Locked ownable synchronizers:
              - None
      

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              Assignee:
              pferraro Paul Ferraro
              Reporter:
              pferraro Paul Ferraro
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