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Posted to issues@flink.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2016/08/20 00:19:20 UTC

[jira] [Created] (FLINK-4437) Lock evasion around lastTriggeredCheckpoint may lead to lost updates to related fields

Ted Yu created FLINK-4437:
-----------------------------

             Summary: Lock evasion around lastTriggeredCheckpoint may lead to lost updates to related fields
                 Key: FLINK-4437
                 URL: https://issues.apache.org/jira/browse/FLINK-4437
             Project: Flink
          Issue Type: Bug
            Reporter: Ted Yu


In CheckpointCoordinator#triggerCheckpoint():
{code}
        // make sure the minimum interval between checkpoints has passed
        if (lastTriggeredCheckpoint + minPauseBetweenCheckpoints > timestamp) {
{code}
If two threads evaluate 'lastTriggeredCheckpoint + minPauseBetweenCheckpoints > timestamp' in close proximity before lastTriggeredCheckpoint is updated, the two threads may have an inconsistent view of "lastTriggeredCheckpoint" and updates to fields correlated with "lastTriggeredCheckpoint" may be lost.



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