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From "Chris Schneider (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-457) Unable to create file in dfs in code run on machine not in the cluster.
Date Wed, 04 Oct 2006 14:39:20 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-457?page=comments#action_12439845 ] 
            
Chris Schneider commented on HADOOP-457:
----------------------------------------

Just FYI, I recently integrated hadoop 0.5 into my copy of the source, rebuit and installed.
I ran into similar "target-length is 0, below MIN_REPLICATION" errors until I realized that
I hadn't deployed the (new in hadoop 0.5) .../webapps/datanode/ servlet on my cluster.

> Unable to create file in dfs in code run on machine not in the cluster.
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-457
>                 URL: http://issues.apache.org/jira/browse/HADOOP-457
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.5.0
>            Reporter: Johan Oskarson
>
> I've got a tiny hadoop cluster and one machine that's not in the cluster that rsync the
latest version off the namenode/jobtracker machine. The machine that's not in the cluster
is then responsible for starting a few jobs here and there.
> However, the latest trunk is unable to create files in the dfs from my code.
> I'm using a simple new OutputStreamWriter(fs.create(file))); and the file creation looks
like it's going ok but then this gets thrown:
> org.apache.hadoop.ipc.RemoteException: java.io.IOException: failed to create file /user/hadoop/submissions/1150000000/1152000000/1152440000/.1155824015.negsub.crc
on client "servernotincluster" because target-length is 0, below MIN_REPLICATION (1)
>         at org.apache.hadoop.dfs.FSNamesystem.startFile(FSNamesystem.java:410)
>         at org.apache.hadoop.dfs.NameNode.create(NameNode.java:202)
>         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:585)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:332)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:468)
>         at org.apache.hadoop.ipc.Client$Connection.run(Client.java:159)
> If I add that machine to the conf/slaves it works fine. Note that it's trying to create
that file on the server that's not in the cluster.

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