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From "amith (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2994) If lease is recovered successfully inline with create, create can fail
Date Sat, 19 May 2012 07:16:09 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13279469#comment-13279469
] 

amith commented on HDFS-2994:
-----------------------------

I have granted the licence but I didn't get Apache feather symbol next to patch :( don't know
QA will apply the patch
                
> If lease is recovered successfully inline with create, create can fail
> ----------------------------------------------------------------------
>
>                 Key: HDFS-2994
>                 URL: https://issues.apache.org/jira/browse/HDFS-2994
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.24.0
>            Reporter: Todd Lipcon
>            Assignee: amith
>         Attachments: HDFS-2994_1.patch, HDFS-2994_1.patch
>
>
> I saw the following logs on my test cluster:
> {code}
> 2012-02-22 14:35:22,887 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: startFile:
recover lease [Lease.  Holder: DFSClient_attempt_1329943893604_0007_m_000376_0_453973131_1,
pendingcreates: 1], src=/benchmarks/TestDFSIO/io_data/test_io_6 from client DFSClient_attempt_1329943893604_0007_m_000376_0_453973131_1
> 2012-02-22 14:35:22,887 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Recovering
lease=[Lease.  Holder: DFSClient_attempt_1329943893604_0007_m_000376_0_453973131_1, pendingcreates:
1], src=/benchmarks/TestDFSIO/io_data/test_io_6
> 2012-02-22 14:35:22,888 WARN org.apache.hadoop.hdfs.StateChange: BLOCK* internalReleaseLease:
All existing blocks are COMPLETE, lease removed, file closed.
> 2012-02-22 14:35:22,888 WARN org.apache.hadoop.hdfs.StateChange: DIR* FSDirectory.replaceNode:
failed to remove /benchmarks/TestDFSIO/io_data/test_io_6
> 2012-02-22 14:35:22,888 WARN org.apache.hadoop.hdfs.StateChange: DIR* NameSystem.startFile:
FSDirectory.replaceNode: failed to remove /benchmarks/TestDFSIO/io_data/test_io_6
> {code}
> It seems like, if {{recoverLeaseInternal}} succeeds in {{startFileInternal}}, then the
INode will be replaced with a new one, meaning the later {{replaceNode}} call can fail.

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