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https://issues.apache.org/jira/browse/HDFS-2800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13217881#comment-13217881
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Aaron T. Myers commented on HDFS-2800:
--------------------------------------
Seems very likely this is due to the race mentioned in the following comment in
StandbyCheckpointer:
{quote}
// TODO(HA): there is a really narrow race here if we are just
// about to start a checkpoint - this won't cancel it!
{quote}
> HA: TestStandbyCheckpoints.testCheckpointCancellation is racy
> -------------------------------------------------------------
>
> Key: HDFS-2800
> URL: https://issues.apache.org/jira/browse/HDFS-2800
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, test
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Eli Collins
> Assignee: Todd Lipcon
>
> TestStandbyCheckpoints.testCheckpointCancellation is racy, have seen the
> following assert on line 212 fail:
> {code}
> assertTrue(StandbyCheckpointer.getCanceledCount() > 0);
> {code}
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