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From Steve Loughran <ste...@apache.org>
Subject Re: Could not obtain block blk_
Date Fri, 07 May 2010 10:09:33 GMT
Pierre ANCELOT wrote:
> Hello, we're having some issues with this...
> Any idea please?
> 
> 2010-05-07 05:59:46,998 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
> Cannot initialize JVM Metrics with processName=MAP, sessionId= - already
> initialized
> 2010-05-07 05:59:54,846 INFO org.apache.hadoop.hdfs.DFSClient: Could not
> obtain block blk_6180178384047700588_1429320 from any node:
> java.io.IOException: No live nodes contain current block
> 2010-05-07 06:00:05,493 INFO org.apache.hadoop.hdfs.DFSClient: Could not
> obtain block blk_6180178384047700588_1429320 from any node:
> java.io.IOException: No live nodes contain current block
> 2010-05-07 06:00:10,358 INFO org.apache.hadoop.hdfs.DFSClient: Could not
> obtain block blk_6180178384047700588_1429320 from any node:
> java.io.IOException: No live nodes contain current block
> 2010-05-07 06:00:14,945 WARN org.apache.hadoop.hdfs.DFSClient: DFS Read:

As it says, "No live nodes contain current block".
This means: no live datanodes have a copy of the block of that file. 
Either some nodes have gone offline, a disk failed or it wasn't replicated.


> java.io.IOException: Could not obtain block: blk_6180178384047700588_1429320
> file=/zzz/Dispatch/input/zzz_24ED346D41543586AE7342997C07F5C8_2010_5_6_mr_24ED346D41543586AE7342997C07F5C8_201056.txt_128
>     at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1812)
>     at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1638)
>     at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1767)
>     at java.io.DataInputStream.read(DataInputStream.java:83)
>     at org.apache.hadoop.util.LineReader.readLine(LineReader.java:134)
>     at
> org.apache.hadoop.mapreduce.lib.input.LineRecordReader.nextKeyValue(LineRecordReader.java:97)
>     at
> org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:423)
>     at
> org.apache.hadoop.mapreduce.MapContext.nextKeyValue(MapContext.java:67)
>     at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:143)
>     at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)
>     at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
>     at org.apache.hadoop.mapred.Child.main(Child.java:170)
> 


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