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https://issues.apache.org/jira/browse/MYFACES-4757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18090279#comment-18090279
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Melloware commented on MYFACES-4757:
------------------------------------
PR submitted with the most minimal changes to fix race conditions:
https://github.com/apache/myfaces/pull/1022
> ApplicationImplEventManager.processGlobalListeners throws
> ArrayIndexOutOfBound when a SystemEventListener unsubscribe itself during
> processEvent
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: MYFACES-4757
> URL: https://issues.apache.org/jira/browse/MYFACES-4757
> Project: MyFaces Core
> Issue Type: Bug
> Reporter: Guillaume Avril
> Priority: Major
>
> When a SystemEventListener unsubscribe itself durint processEvent, the
> ApplicationImplEventManager.processGlobalListeners throws an
> ArrayIndexOutOfBound, because the eventInfos list size reduced by one, and
> fail during the iteration by index.
>
> To reproduce, just have a SystemEventListener that unsubscribes itself.
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