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https://issues.apache.org/jira/browse/HDFS-3894?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved HDFS-3894.
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Resolution: Fixed
Fix Version/s: QuorumJournalManager (HDFS-3077)
Hadoop Flags: Reviewed
Committed to branch, thx for review
> QJM: testRecoverAfterDoubleFailures can be flaky due to IPC client caching
> --------------------------------------------------------------------------
>
> Key: HDFS-3894
> URL: https://issues.apache.org/jira/browse/HDFS-3894
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: test
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: QuorumJournalManager (HDFS-3077)
>
> Attachments: hdfs-3894.txt
>
>
> TestQJMWithFaults.testRecoverAfterDoubleFailures fails really occasionally.
> Looking into it, the issue seems to be that it's possible by random chance
> for an IPC server port to be reused between two different iterations of the
> test loop. The client will then pick up and re-use the existing IPC
> connection to the old server. However, the old server was shut down and
> restarted, so the old IPC connection is stale (ie disconnected). This causes
> the new client to get an EOF when it sends the "format()" call.
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