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https://issues.apache.org/jira/browse/FLINK-6400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15987605#comment-15987605
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Stephan Ewen commented on FLINK-6400:
-------------------------------------
I think this is a theoretical issue more. The hooks are not manipulated after
the coordinator is instantiated.
Will patch this anyways, to make the code clear...
> Lack of protection accessing masterHooks in
> CheckpointCoordinator#triggerCheckpoint
> -----------------------------------------------------------------------------------
>
> Key: FLINK-6400
> URL: https://issues.apache.org/jira/browse/FLINK-6400
> Project: Flink
> Issue Type: Bug
> Reporter: Ted Yu
> Priority: Minor
>
> Here is related code:
> {code}
> synchronized (triggerLock) {
> ...
> try {
> List<MasterState> masterStates =
> MasterHooks.triggerMasterHooks(masterHooks.values(),
> {code}
> masterHooks is protected by lock in other methods while triggerLock is only
> used in CheckpointCoordinator#triggerCheckpoint()
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