[jboss-jira] [JBoss JIRA] (WFLY-9900) EJB client rarely hangs

[Richard Janík (JIRA)]

Richard Janík created WFLY-9900:
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             Summary: EJB client rarely hangs
                 Key: WFLY-9900
                 URL: https://issues.jboss.org/browse/WFLY-9900
             Project: WildFly
          Issue Type: Bug
          Components: Clustering, EJB
    Affects Versions: 12.0.0.Beta1
            Reporter: Richard Janík
            Assignee: Paul Ferraro


Seen in our clustering tests where remote EJB clients invoke beans on 4 servers in cluster, while each of those is being killed and restarted. This is done in sequence and there's plenty of time in between the kill/start/kill-another (1 minute).

In two ouf our tests, we saw a small number of clients hang and resist termination at the end. The scenarios are:
[jvmkill-dist-sync|https://jenkins.hosts.mwqe.eng.bos.redhat.com/hudson/job/perflab_eap-7x-failover-ejb-ejbremote-jvmkill-dist-sync/36/] (36 clients)
[shutdown-dist-sync|https://jenkins.hosts.mwqe.eng.bos.redhat.com/hudson/job/perflab_eap-7x-failover-ejb-ejbremote-shutdown-dist-sync-3owners/32/] (1 client)

The hangs are not related to any error or warning message on the server-side. There are ClosedChannelExceptions on the client side, but these seem to be unrelated as the numbers of clients reporting the exceptions are not the same (lower) as the numbers of hanging clients.

No thread dump as I didn't manage to reproduce yet.

Might be related to JBEAP-12074 or JBEAP-13169.



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