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From stack <st...@duboce.net>
Subject Re: Exception in mapreduce program
Date Thu, 21 May 2009 15:57:45 GMT
Is your hdfs healthy?  I usually see the error below when there are no
datanodes running.
St.Ack

On Wed, May 20, 2009 at 10:09 PM, Puri, Aseem <Aseem.Puri@honeywell.com>wrote:

> Hi
>
>            I am running map reduce row count program to count number of
> rows in my HBase table. It is giving the following exception:
>
>
>
> 09/05/21 10:31:47 INFO hdfs.DFSClient:
> org.apache.hadoop.ipc.RemoteException: java.io.IOException: File
> /hadoop/mapred/system/job_200905211019_0003/job.jar could only be
> replicated to 0 nodes, instead of 1
>
>      at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(F
> SNamesystem.java:1280)
>
>      at
> org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:3
> 51)
>
>      at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
>
>      at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:25)
>
>      at java.lang.reflect.Method.invoke(Method.java:597)
>
>      at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)
>
>      at org.apache.hadoop.ipc.Server$Handler.run(Server.java:894)
>
>
>
>      at org.apache.hadoop.ipc.Client.call(Client.java:697)
>
>      at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
>
>      at $Proxy0.addBlock(Unknown Source)
>
>      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
>      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>
>      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>
>      at java.lang.reflect.Method.invoke(Unknown Source)
>
>      at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvo
> cationHandler.java:82)
>
>      at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocation
> Handler.java:59)
>
>      at $Proxy0.addBlock(Unknown Source)
>
>      at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DF
> SClient.java:2814)
>
>      at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(D
> FSClient.java:2696)
>
>      at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.j
> ava:1996)
>
>      at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSCli
> ent.java:2183)
>
>
>
> 09/05/21 10:31:47 WARN hdfs.DFSClient: NotReplicatedYetException
> sleeping /hadoop/mapred/system/job_200905211019_0003/job.jar retries
> left 4
>
>
>
> Please tell me how I can solve this exception.
>
>
>
> Thanks & Regards
>
> Aseem Puri
>
>
>
>
>
>

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