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https://issues.apache.org/jira/browse/HADOOP-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur updated HADOOP-2044:
-------------------------------------
Priority: Blocker (was: Major)
> 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
>
>
> 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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