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From Harsh J <qwertyman...@gmail.com>
Subject Re: could only be replicated to 0 nodes, instead of 1
Date Thu, 01 Jul 2010 08:49:56 GMT
Did you check if your Datanode(s) is/are up? The Namenode's web
interface reports statistics about live/dead datanodes.

NN is trying to replicate your data to N (in your case, 1) datanodes
but it can find none.

On Thu, Jul 1, 2010 at 1:48 PM, Pierre ANCELOT <pierreact@gmail.com> wrote:
> Hello everyone :)
> Any idea how to troubleshoot this please?
> I don't get where this comes from.
>
>
> 2010-07-01 08:29:02,721 WARN org.apache.hadoop.hdfs.DFSClient:
> DataStreamer Exception: org.apache.hadoop.ipc.RemoteException:
> java.io.IOException: File
> /acd/Dispatch/data/user100/historyreport/020920360E55A807CECDFC34621E90C5/last
> could only be replicated to 0 nodes, instead of 1
>
>
>        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271)
>        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422)
>        at sun.reflect.GeneratedMethodAccessor68.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$Server.call(RPC.java:508)
>        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
>
>
>        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
>        at java.security.AccessController.doPrivileged(Native Method)
>        at javax.security.auth.Subject.doAs(Subject.java:396)
>        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
>
>
>
>        at org.apache.hadoop.ipc.Client.call(Client.java:740)
>        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
>        at $Proxy1.addBlock(Unknown Source)
>        at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
>
>
>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
>
>
>        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
>        at $Proxy1.addBlock(Unknown Source)
>        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2937)
>
>
>        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2819)
>        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2102)
>        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2288)
>
>
> Thank you.
>
> --
> http://www.neko-consulting.com
> Ego sum quis ego servo
> "Je suis ce que je protège"
> "I am what I protect"
>



-- 
Harsh J
www.harshj.com

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