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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-11078) NPE in LazyPersistFileScrubber
Date Fri, 26 May 2017 20:46:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

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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