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From Todd Lipcon <t...@cloudera.com>
Subject Re: datanode goes down, maybe due to Unexpected problem in creating temporary file
Date Mon, 17 May 2010 18:43:12 GMT
Hi Ted,

Can you please grep your NN and DN logs for blk_926027507678171558 and
pastebin the results?

-Todd

On Mon, May 17, 2010 at 9:57 AM, Ted Yu <yuzhihong@gmail.com> wrote:

> Hi,
> We use CDH2 hadoop-0.20.2+228 which crashed on datanode smsrv10.ciq.com
>
> I found this in datanode log:
>
> 2010-05-15 07:37:35,955 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block
> blk_926027507678171558_3620 src: /10.32.56.170:53378 dest: /
> 10.32.56.171:50010
> 2010-05-15 07:37:35,956 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock
> blk_926027507678171558_3620 received exception java.io.IOException:
> Unexpected problem in creating temporary file for
> blk_926027507678171558_3620.  File
>
> /home/hadoop/m2m_3.0.x/3.0.trunk.39-270238/data/hadoop-data/dfs/data/tmp/blk_926027507678171558
> should not be present, but is.
> 2010-05-15 07:37:35,956 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(
> 10.32.56.171:50010,
> storageID=DS-1723593983-10.32.56.171-50010-1273792791835, infoPort=50075,
> ipcPort=50020):DataXceiver
> java.io.IOException: Unexpected problem in creating temporary file for
> blk_926027507678171558_3620.  File
>
> /home/hadoop/m2m_3.0.x/3.0.trunk.39-270238/data/hadoop-data/dfs/data/tmp/blk_926027507678171558
> should not be present, but is.
>        at
>
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.createTmpFile(FSDataset.java:398)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.createTmpFile(FSDataset.java:376)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.FSDataset.createTmpFile(FSDataset.java:1133)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.FSDataset.writeToBlock(FSDataset.java:1022)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.<init>(BlockReceiver.java:98)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:259)
>        at
>
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:103)
>        at java.lang.Thread.run(Thread.java:619)
>
> Can someone provide some clue ?
>
> Thanks
>



-- 
Todd Lipcon
Software Engineer, Cloudera

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