[jira] [Created] (FLINK-4482) numUnsuccessfulCheckpointsTriggers is accessed without holding triggerLock

[Shang Yuanchun (Jira)]

Ted Yu created FLINK-4482:
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             Summary: 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
            Priority: Minor


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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