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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-812) FSNamesystem#internalReleaseLease throws NullPointerException on a single-block file's lease recovery
Date Wed, 16 Dec 2009 04:10:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12791184#action_12791184
] 

Hudson commented on HDFS-812:
-----------------------------

Integrated in Hadoop-Hdfs-trunk-Commit #148 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Hdfs-trunk-Commit/148/])
    

> FSNamesystem#internalReleaseLease throws NullPointerException on a single-block file's
lease recovery
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-812
>                 URL: https://issues.apache.org/jira/browse/HDFS-812
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.21.0, 0.22.0
>            Reporter: Konstantin Boudnik
>            Assignee: Konstantin Boudnik
>            Priority: Blocker
>         Attachments: HDFS-812.patch, HDFS-812.patch, HDFS-812.patch, HDFS-812.patch,
HDFS-812.patch
>
>
> {{FSNamesystem.internalReleaseLease()}} uses the result of {{iFile#numBlocks();}} call
to get a number of an under construction file's blocks. {{numBlock()}} can return 0 if the
file doesn't have any blocks yet. This will cause {{internalReleaseLease()}} to throw ArrayIndexOutOfBoundException.
> In case of a single block file, the same method will throw NullPointerException because
the penultimate block is going to be null according to the logic of INodeFile#getPenultimateBlock().

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