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https://issues.apache.org/jira/browse/FLUME-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14131835#comment-14131835
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Hari Shreedharan commented on FLUME-2420:
-----------------------------------------
+1. Committing this after running tests. I added a synchronized block around
the clear call at the end of stop as well to fix possible contention with other
threads.
> HDFSEventSink#stop might throw ConcurrentModificationException
> --------------------------------------------------------------
>
> Key: FLUME-2420
> URL: https://issues.apache.org/jira/browse/FLUME-2420
> Project: Flume
> Issue Type: Bug
> Components: Sinks+Sources
> Affects Versions: v1.5.0
> Reporter: chenshangan
> Assignee: chenshangan
> Attachments: FLUME-2420.patch
>
>
> There's a chance that bucketWriter callback and HDFSEventSink#stop operate on
> sfWriter together. So synchronized should apply before operation on sfWriter.
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