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From "Plamen Jeliazkov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5077) NPE in FSNamesystem.commitBlockSynchronization()
Date Wed, 28 Aug 2013 06:25:52 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5077?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Plamen Jeliazkov updated HDFS-5077:
-----------------------------------

    Attachment: HDFS-5077_3.patch

Attaching latest patch for trunk. Modified with Konstantin's suggestion.
                
> NPE in FSNamesystem.commitBlockSynchronization()
> ------------------------------------------------
>
>                 Key: HDFS-5077
>                 URL: https://issues.apache.org/jira/browse/HDFS-5077
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.0.5-alpha
>            Reporter: Konstantin Shvachko
>            Assignee: Plamen Jeliazkov
>         Attachments: HDFS-5077_2.patch, HDFS-5077_3.patch, HDFS-5077.patch
>
>
> NN starts a block recovery, which will synchronize block replicas on different DNs. In
the end one of DNs will report the list of the nodes containing the consistent replicas to
the NN via commitBlockSynchronization() call. The NPE happens if just before processing commitBlockSynchronization()
NN removes from active one of DNs that are then reported in the call.

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