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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (FLINK-4482) numUnsuccessfulCheckpointsTriggers is accessed without holding triggerLock
Date Fri, 23 Sep 2016 17:17:20 GMT

     [ https://issues.apache.org/jira/browse/FLINK-4482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stephan Ewen closed FLINK-4482.
-------------------------------

> numUnsuccessfulCheckpointsTriggers is accessed without holding triggerLock
> --------------------------------------------------------------------------
>
>                 Key: FLINK-4482
>                 URL: https://issues.apache.org/jira/browse/FLINK-4482
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Minor
>             Fix For: 1.2.0
>
>
> In CheckpointCoordinator#stopCheckpointScheduler() :
> {code}
>     synchronized (lock) {
> ...
>       numUnsuccessfulCheckpointsTriggers = 0;
> {code}
> triggerLock is not held in the above operation.
> See comment for triggerLock earlier in triggerCheckpoint():
> {code}
>     // we lock with a special lock to make sure that trigger requests do not overtake
each other.
>     // this is not done with the coordinator-wide lock, because the 'checkpointIdCounter'
>     // may issue blocking operations. Using a different lock than teh coordinator-wide
lock,
>     // we avoid blocking the processing of 'acknowledge/decline' messages during that
time.
>     synchronized (triggerLock) {
> {code}



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