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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-4437) Lock evasion around lastTriggeredCheckpoint may lead to lost updates to related fields
Date Sat, 20 Aug 2016 00:19:20 GMT
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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