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  1. WildFly
  2. WFLY-11036

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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          is cloned by

          Bug - A problem that impairs or prevents the functions of the product. JBEAP-15777 [GSS](7.2.z) Shutdown hangs if WAR is distributable and uses SSE

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Verified
          is related to

          Bug - A problem that impairs or prevents the functions of the product. JBEAP-15778 [GSS](7.1.z) Shutdown hangs if WAR is distributable and uses SSE

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

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              pferraro@redhat.com Paul Ferraro
              rdicroce Richard DiCroce (Inactive)
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