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From "Konstantin Boudnik (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-812) FSNamesystem#internalReleaseLease will throw ArrayIndexOutOfBoundException on an empty file's lease recovery
Date Mon, 07 Dec 2009 19:05:18 GMT

     [ https://issues.apache.org/jira/browse/HDFS-812?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Konstantin Boudnik updated HDFS-812:
------------------------------------

    Attachment: HDFS-812.patch

This patch includes new test which illustrate the problem. NB: the test's contract might have
to be changed depending on the resolution of the JIRA itself.

> FSNamesystem#internalReleaseLease will throw ArrayIndexOutOfBoundException on an empty
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
>         Attachments: 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

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