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From Harsh J <ha...@cloudera.com>
Subject Re: Can not generate a result
Date Mon, 13 Aug 2012 14:50:13 GMT
Hi Astie,

You can look at http://wiki.apache.org/hadoop/CouldOnlyBeReplicatedTo
to find a solution on this one. Speaking w.r.t. first-timers, this
frequently happens when you format the NameNode but forget to wipe the
DataNode block directories at the same time.

On Mon, Aug 13, 2012 at 10:06 AM, Astie Darmayantie
<astie.darmayantie@yahoo.com> wrote:
> hi i am new to hadoop.
> i already do the the precautionary measures like : configuring hadoop as
> pseudo-distributed operations, namenode -format etc. before
> running start-all.sh
>
> and i try to execute sample program WordCount by using :
> ./bin/hadoop jar /home/astie/thesis/project_eclipse/WordCount.jar WordCount
> /home/astie/thesis/project_eclipse/input/
> /home/astie/thesis/project_eclipse/output/
>
> it doesn't generate the result and i got this in the log file :
>
> 2012-08-13 11:28:27,053 WARN org.apache.hadoop.hdfs.DFSClient: Error
> Recovery for block null bad datanode[0] nodes == null
> 2012-08-13 11:28:27,053 WARN org.apache.hadoop.hdfs.DFSClient: Could not get
> block locations. Source file "/tmp/mapred/system/jobtracker.info" -
> Aborting...
> 2012-08-13 11:28:27,053 WARN org.apache.hadoop.mapred.JobTracker: Writing to
> file hdfs://localhost:9000/tmp/mapred/system/jobtracker.info failed!
> 2012-08-13 11:28:27,054 WARN org.apache.hadoop.mapred.JobTracker: FileSystem
> is not ready yet!
> 2012-08-13 11:28:27,059 WARN org.apache.hadoop.mapred.JobTracker: Failed to
> initialize recovery manager.
> org.apache.hadoop.ipc.RemoteException: java.io.IOException: File
> /tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes,
> instead of 1
>         at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558)
>         at
> org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
>         at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:416)
>         at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)
>
>         at org.apache.hadoop.ipc.Client.call(Client.java:1070)
>         at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
>         at $Proxy5.addBlock(Unknown Source)
>         at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:616)
>         at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
>         at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
>         at $Proxy5.addBlock(Unknown Source)
>         at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3510)
>         at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3373)
>         at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2589)
>         at
> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2829)
>
> i am using openSuse and hadoop-1.0.3 also using eclipse to write the
> program.
> it is said that the node was null. yes, i am still running it with my
> computer only. is it the problem?
> can you tell me how to fix this? thank you



-- 
Harsh J

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