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Posted to common-dev@hadoop.apache.org by "Brian Bockelman (JIRA)" <ji...@apache.org> on 2008/12/15 01:51:44 UTC

[jira] Commented: (HADOOP-4866) NameNode error in commitBlockSynchronization

    [ https://issues.apache.org/jira/browse/HADOOP-4866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656515#action_12656515 ] 

Brian Bockelman commented on HADOOP-4866:
-----------------------------------------

Here is the error message I'm getting:

2008-12-14 18:43:37,884 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: commitBlockSynchronization(lastblock=blk_-1466661706312681205_91866, newgenerationstamp=0, newlength=0, newtargets=[])
2008-12-14 18:43:37,884 INFO org.apache.hadoop.ipc.Server: IPC Server handler 33 on 9000, call commitBlockSynchronization(blk_-1466661706312681205_91866, 0, 0, false, true, [Lorg.apache.hadoop.hdfs.protocol.DatanodeID;@b4e602c) from 172.16.1.162:44797: error: java.io.IOException: Block (=blk_-1466661706312681205_91866) not found
java.io.IOException: Block (=blk_-1466661706312681205_91866) not found
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.commitBlockSynchronization(FSNamesystem.java:1898)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.commitBlockSynchronization(NameNode.java:410)
	at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:452)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:892)


> NameNode error in commitBlockSynchronization
> --------------------------------------------
>
>                 Key: HADOOP-4866
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4866
>             Project: Hadoop Core
>          Issue Type: Bug
>            Reporter: Brian Bockelman
>
> The NameNode continuously has an error in the commitBlockSynchronization.  This happens for ~5 blocks at a rate of 5-10Hz.  I have no idea when this started happening because this has been going on for days, well past the start of our current logs.
> This appears to be a new symptom in 0.19.0, but I have no idea what could be causing it.

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