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https://issues.apache.org/jira/browse/HDFS-1597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-1597:
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Priority: Blocker (was: Critical)
Bumping to blocker priority. This bug also causes a >3x performance regression
in NNThroughputBenchmark due to lost opportunities to batch syncs
> Batched edit log syncs can reset synctxid throw assertions
> ----------------------------------------------------------
>
> Key: HDFS-1597
> URL: https://issues.apache.org/jira/browse/HDFS-1597
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Blocker
> Fix For: 0.22.0
>
> Attachments: hdfs-1597.txt, illustrate-test-failure.txt
>
>
> The top of FSEditLog.logSync has the following assertion:
> {code}
> assert editStreams.size() > 0 : "no editlog streams";
> {code}
> which should actually come after checking to see if the sync was already
> batched in by another thread.
> This is related to a second bug in which the same case causes synctxid to be
> reset to 0
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