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https://issues.apache.org/jira/browse/HDFS-11078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko resolved HDFS-11078.
----------------------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Fix Version/s: 2.8.2
3.0.0-alpha3
2.7.4
2.9.0
I just committed this. Thank you [~elgoiri].
> NPE in LazyPersistFileScrubber
> ------------------------------
>
> Key: HDFS-11078
> URL: https://issues.apache.org/jira/browse/HDFS-11078
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Inigo Goiri
> Assignee: Inigo Goiri
> Fix For: 2.9.0, 2.7.4, 3.0.0-alpha3, 2.8.2
>
> Attachments: HDFS-11078.000.patch, HDFS-11078.001.patch,
> HDFS-11078-branch-2.7.patch
>
>
> If a block is removed, it will be removed from the block map. When the
> clearCorruptLazyPersistFiles() tries to delete the block, it may already be
> deleted and generate a null pointer exception.
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem$LazyPersistFileScrubber.clearCorruptLazyPersistFiles(FSNamesystem.java:3820)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem$LazyPersistFileScrubber.run(FSNamesystem.java:3851)
> at java.lang.Thread.run(Thread.java:745)
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