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From ashish pareek <pareek...@gmail.com>
Subject Re: Could only be replicated to 0 nodes, instead of 1
Date Thu, 21 May 2009 11:29:54 GMT
Hi ,

    I have two suggestion

i)Choose a right version ( Hadoop- 0.18 is good)
ii)replication should be 3 as ur having 3 modes.( Indirectly see to it that
ur configuration is correct !!)

Hey even i am just suggesting this as i am also a new to hadoop

Ashish Pareek


On Thu, May 21, 2009 at 2:41 PM, Stas Oskin <stas.oskin@gmail.com> wrote:

> Hi.
>
> I'm testing Hadoop in our lab, and started getting the following message
> when trying to copy a file:
> Could only be replicated to 0 nodes, instead of 1
>
> I have the following setup:
>
> * 3 machines, 2 of them with only 80GB of space, and 1 with 1.5GB
> * Two clients are copying files all the time (one of them is the 1.5GB
> machine)
> * The replication is set on 2
> * I let the space on 2 smaller machines to end, to test the behavior
>
> Now, one of the clients (the one located on 1.5GB) works fine, and the
> other
> one - the external, unable to copy and displays the error + the exception
> below
>
> Any idea if this expected on my scenario? Or how it can be solved?
>
> Thanks in advance.
>
>
>
> 09/05/21 10:51:03 WARN dfs.DFSClient: NotReplicatedYetException sleeping
> /test/test.bin retries left 1
>
> 09/05/21 10:51:06 WARN dfs.DFSClient: DataStreamer Exception:
> org.apache.hadoop.ipc.RemoteException: java.io.IOException: File
> /test/test.bin could only be replicated to 0 nodes, instead of 1
>
>            at
>
> org.apache.hadoop.dfs.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1123
> )
>
>            at org.apache.hadoop.dfs.NameNode.addBlock(NameNode.java:330)
>
>            at sun.reflect.GeneratedMethodAccessor8.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$Server.call(RPC.java:481)
>
>            at org.apache.hadoop.ipc.Server$Handler.run(Server.java:890)
>
>
>
>            at org.apache.hadoop.ipc.Client.call(Client.java:716)
>
>            at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
>
>            at org.apache.hadoop.dfs.$Proxy0.addBlock(Unknown Source)
>
>            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
>            at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
> )
>
>            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 org.apache.hadoop.dfs.$Proxy0.addBlock(Unknown Source)
>
>            at
>
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2450
> )
>
>            at
>
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2333
> )
>
>            at
>
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.access$1800(DFSClient.java:1745
> )
>
>            at
>
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:1922
> )
>
>
>
> 09/05/21 10:51:06 WARN dfs.DFSClient: Error Recovery for block null bad
> datanode[0]
>
> java.io.IOException: Could not get block locations. Aborting...
>
>            at
>
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.processDatanodeError(DFSClient.java:2153
> )
>
>            at
>
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.access$1400(DFSClient.java:1745
> )
>
>            at
>
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:1899
> )
>

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