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https://issues.apache.org/jira/browse/HDFS-1202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089039#comment-13089039
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Jitendra Nath Pandey commented on HDFS-1202:
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+1 for hdfs-1202.20s.patch.
> DataBlockScanner throws NPE when updated before initialized
> -----------------------------------------------------------
>
> Key: HDFS-1202
> URL: https://issues.apache.org/jira/browse/HDFS-1202
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 0.20-append, 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.20-append, 0.20.205.0, 0.22.0
>
> Attachments: hdfs-1202-0.20-append.txt, hdfs-1202.20s.patch,
> hdfs-1202.txt
>
>
> Missing an isInitialized() check in updateScanStatusInternal
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