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From: Harsh J <qwertymaniac@gmail.com>
Date: Thu, 1 Jul 2010 14:19:56 +0530
Message-ID: <AANLkTikhjGUimP-s5cigDOJK1D0ECLLxfwui676VNLaV@mail.gmail.com>
Subject: Re: could only be replicated to 0 nodes, instead of 1
To: common-user@hadoop.apache.org
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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
>
>
> =A0 =A0 =A0 =A0at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.get=
AdditionalBlock(FSNamesystem.java:1271)
> =A0 =A0 =A0 =A0at org.apache.hadoop.hdfs.server.namenode.NameNode.addBloc=
k(NameNode.java:422)
> =A0 =A0 =A0 =A0at sun.reflect.GeneratedMethodAccessor68.invoke(Unknown So=
urce)
>
>
> =A0 =A0 =A0 =A0at sun.reflect.DelegatingMethodAccessorImpl.invoke(Delegat=
ingMethodAccessorImpl.java:25)
> =A0 =A0 =A0 =A0at java.lang.reflect.Method.invoke(Method.java:597)
> =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
> =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:=
959)
>
>
> =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:=
955)
> =A0 =A0 =A0 =A0at java.security.AccessController.doPrivileged(Native Meth=
od)
> =A0 =A0 =A0 =A0at javax.security.auth.Subject.doAs(Subject.java:396)
> =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.Server$Handler.run(Server.java:95=
3)
>
>
>
> =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.Client.call(Client.java:740)
> =A0 =A0 =A0 =A0at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
> =A0 =A0 =A0 =A0at $Proxy1.addBlock(Unknown Source)
> =A0 =A0 =A0 =A0at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Sou=
rce)
>
>
> =A0 =A0 =A0 =A0at sun.reflect.DelegatingMethodAccessorImpl.invoke(Delegat=
ingMethodAccessorImpl.java:25)
> =A0 =A0 =A0 =A0at java.lang.reflect.Method.invoke(Method.java:597)
> =A0 =A0 =A0 =A0at org.apache.hadoop.io.retry.RetryInvocationHandler.invok=
eMethod(RetryInvocationHandler.java:82)
>
>
> =A0 =A0 =A0 =A0at org.apache.hadoop.io.retry.RetryInvocationHandler.invok=
e(RetryInvocationHandler.java:59)
> =A0 =A0 =A0 =A0at $Proxy1.addBlock(Unknown Source)
> =A0 =A0 =A0 =A0at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locate=
FollowingBlock(DFSClient.java:2937)
>
>
> =A0 =A0 =A0 =A0at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBl=
ockOutputStream(DFSClient.java:2819)
> =A0 =A0 =A0 =A0at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access=
$2000(DFSClient.java:2102)
> =A0 =A0 =A0 =A0at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataSt=
reamer.run(DFSClient.java:2288)
>
>
> Thank you.
>
> --
> http://www.neko-consulting.com
> Ego sum quis ego servo
> "Je suis ce que je prot=E8ge"
> "I am what I protect"
>


--=20
Harsh J
www.harshj.com