[jboss-jira] [JBoss JIRA] (WFLY-11036) Shutdown hangs if WAR is distributable and uses SSE

[Paul Ferraro (Jira)]

    [ https://issues.jboss.org/browse/WFLY-11036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13657212#comment-13657212 ] 

Paul Ferraro edited comment on WFLY-11036 at 11/6/18 8:55 AM:
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The fix for WFLY-7695 added a lifecycle lock to the distributed session manager that would block shutdown until all sessions are closed.  However, this has adverse effect on long running async contexts.
We should drop this overeager locking and defer to Infinispan's transaction table to perform the requisite graceful shutdown behavior.


was (Author: pferraro):
The fix for WFLY-7695 added a lifecycle lock to the distributed session manager that would block shutdown until all sessions are closed.  However, this has adverse effect on long running async contexts.

> Shutdown hangs if WAR is distributable and uses SSE
> ---------------------------------------------------
>
>                 Key: WFLY-11036
>                 URL: https://issues.jboss.org/browse/WFLY-11036
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering, Web (Undertow)
>    Affects Versions: 14.0.0.Final
>            Reporter: Rich DiCroce
>            Assignee: Paul Ferraro
>            Priority: Major
>         Attachments: wfly-11036-0.0.1-SNAPSHOT.war, wfly-11036-src.zip
>
>
> 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.
> {code}
> "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
> {code}



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