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  1. WildFly
  2. WFLY-5178

Intermittent failure: NullPointerException during undeployment

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    Description

      Intermittent failure, so far seen in only one failover test for remote stateful EJBs:
      scenario ejb-ejbremote-undeploy-dist-async

      Setup: 4 node cluster, one node at time undeploys application (clusterbench-ee7.ear), while standalone clients keep calling the application.

      Just before server perf19 finished undeployment of the application, it logged this error 50 times:

      [JBossINF] [0m[31m14:50:41,136 ERROR [org.jboss.as.ejb3.remote] (EJB default - 9) WFLYEJB0151: Exception while generating session id for component RemoteStatefulSBImpl with invocation id: -28551 on channel Channel ID 1ca843e6 (inbound) of Remoting connection 4b2907f9 to /10.16.90.52:58920: javax.ejb.EJBException: java.lang.NullPointerException
      [JBossINF] 	at org.jboss.as.ejb3.component.stateful.StatefulSessionComponent.createSessionRemote(StatefulSessionComponent.java:263)
      [JBossINF] 	at org.jboss.as.ejb3.remote.protocol.versionone.SessionOpenRequestHandler$SessionIDGeneratorTask.run(SessionOpenRequestHandler.java:145)
      [JBossINF] 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      [JBossINF] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
      [JBossINF] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      [JBossINF] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      [JBossINF] 	at java.lang.Thread.run(Thread.java:745)
      [JBossINF] 	at org.jboss.threads.JBossThread.run(JBossThread.java:320)
      [JBossINF] Caused by: java.lang.NullPointerException
      [JBossINF] 	at org.jboss.as.ejb3.component.stateful.StatefulSessionComponent.createSession(StatefulSessionComponent.java:238)
      [JBossINF] 	at org.jboss.as.ejb3.component.stateful.StatefulSessionComponent.createSessionRemote(StatefulSessionComponent.java:258)
      [JBossINF] 	... 7 more
      

      The other nodes did not log this error.

      Server log:
      http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/eap-7x-failover-ejb-ejbremote-undeploy-dist-async/4/console-perf19/

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              rachmato@redhat.com Richard Achmatowicz
              mvinkler1@redhat.com Michal Vinkler
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