[jboss-jira] [JBoss JIRA] (WFLY-1351) Incorrect exception handling in CoreGroupCommunicationService#handle

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-1351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12800463#comment-12800463 ] 

RH Bugzilla Integration commented on WFLY-1351:
-----------------------------------------------

Paul Ferraro <paul.ferraro at redhat.com> made a comment on [bug 963448|https://bugzilla.redhat.com/show_bug.cgi?id=963448]

Technically, this issue is still relevant to 6.2 and 6.3, as this class will continue to exist.  However, the plan for EAP 6.3 is to drop usage of this object for locking web sessions.
                
> Incorrect exception handling in CoreGroupCommunicationService#handle
> --------------------------------------------------------------------
>
>                 Key: WFLY-1351
>                 URL: https://issues.jboss.org/browse/WFLY-1351
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering
>            Reporter: Dennis Reed
>            Assignee: Paul Ferraro
>             Fix For: 8.0.0.Alpha3
>
>
> org/jboss/as/clustering/impl/CoreGroupCommunicationService#handle catches and hides any internal exceptions, and just returns null instead.
> This breaks callers of CoreGroupCommunicationService when they get a null value where it's not expected (after verifying that the response was not flagged as an exception)
>     java.lang.NullPointerException
>         at org.jboss.as.clustering.lock.AbstractClusterLockSupport.lock(AbstractClusterLockSupport.java:157)
> It also catches an exception from the called method, and returns it as the return value, instead of just throwing it as an exception so it can be properly returned as an exception inside JGroups' RequestCorrelator.

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