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https://issues.apache.org/jira/browse/HDFS-2281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uma Maheswara Rao G updated HDFS-2281:
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Status: Open (was: Patch Available)
> NPE in checkpoint during processIOError()
> -----------------------------------------
>
> Key: HDFS-2281
> URL: https://issues.apache.org/jira/browse/HDFS-2281
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Konstantin Shvachko
> Assignee: Uma Maheswara Rao G
> Fix For: 0.22.0
>
> Attachments: BN-bug-NPE.txt, HDFS-2281.patch
>
>
> At the end of checkpoint BackupNode tries to convergeJournalSpool() and calls
> revertFileStreams(). The latter closes each file stream, and tries to rename
> the corresponding file to its permanent location current/edits. If for any
> reason the rename fails processIOError() is called for failed streams.
> processIOError() will try to close the stream again and will get NPE in
> EditLogFileOutputStream.close() because bufCurrent was set to null by the
> previous close.
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