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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2044) Namenode encounters ClassCastException exceptions for INodeFileUnderConstruction
Date Fri, 12 Oct 2007 21:30:50 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

dhruba borthakur updated HADOOP-2044:
-------------------------------------

    Attachment: InodeClassException.patch

> Namenode encounters ClassCastException exceptions for INodeFileUnderConstruction
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-2044
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2044
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>            Priority: Blocker
>             Fix For: 0.15.0
>
>         Attachments: InodeClassException.patch
>
>
> A distcp command running on one 400 node cluster shows this exception:
> org.apache.hadoop.fs.FSNamesystem: Removing lease [Lease.  Holder: 44 46 53 43 6c 69
65 6e 74 5f 74 61 73 6b 5f 32 30 30 37 31 30 31 31 32 32 35 37 5f 30 30 30 33 5f 6d 5f 30
30 30 30 39 32 5f 30, heldlocks: 0, pendingcreates: 0], leases remaining: 736
> org.apache.hadoop.dfs.StateChange: DIR* NameSystem.internalReleaseCreate: attempt to
release a create lock on /user/xxxx/logs_21/_task_200710112257_0003_m_000027_0/part-00027
file does not exist.
>  org.apache.hadoop.fs.FSNamesystem: Removing lease [Lease.  Holder: 44 46 53 43 6c 69
65 6e 74 5f 74 61 73 6b 5f 32 30 30 37 31 30 31 31 32 32 35 37 5f 30 30 30 33 5f 6d 5f 30
30 30 30 32 37 5f 30, heldlocks: 0, pendingcreates: 0], leases remaining: 735
>  org.apache.hadoop.fs.FSNamesystem: java.lang.ClassCastException: org.apache.hadoop.dfs.INodeFile
cannot be cast to org.apache.hadoop.dfs.INodeFileUnderConstruction
>         at org.apache.hadoop.dfs.FSNamesystem.internalReleaseCreate(FSNamesystem.java:1566)
>         at org.apache.hadoop.dfs.FSNamesystem.access$100(FSNamesystem.java:51)
>         at org.apache.hadoop.dfs.FSNamesystem$Lease.releaseLocks(FSNamesystem.java:1463)
>         at org.apache.hadoop.dfs.FSNamesystem$LeaseMonitor.run(FSNamesystem.java:1525)
>         at java.lang.Thread.run(Thread.java:619)

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