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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: New Datanode won't start, null pointer exception
Date Thu, 18 Mar 2010 20:41:49 GMT
Google is your friend ;)

https://issues.apache.org/jira/browse/HADOOP-5687

J-D

On Thu, Mar 18, 2010 at 1:29 PM, Scott <skester@weather.com> wrote:
> We have a working 10 node cluster and are trying to add an 11th box (insert
> Spinal Tap joke here).  The box (Centos Linux) was built in an identical
> manner to the other 10 and has the same version of hadoop (0.20.2).  The
> configs are the exact same as the other nodes.  However when trying to start
> the hadoop daemons it throws a NPE.  Here is all that is written to the
> logs.  Any idea whats causing this?
>
> ************************************************************/
> 2010-03-18 16:09:42,993 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
> /************************************************************
> STARTUP_MSG: Starting DataNode
> STARTUP_MSG:   host = hadoop0b10/192.168.60.100
> STARTUP_MSG:   args = []
> STARTUP_MSG:   version = 0.20.2
> STARTUP_MSG:   build =
> https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r
> 911707; compiled by 'chrisdo' on Fri Feb
> 19 08:07:34 UTC 2010
> ************************************************************/
> 2010-03-18 16:09:43,058 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode:
> java.lang.NullPointerException
>   at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:134)
>   at
> org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:156)
>   at
> org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:160)
>   at
> org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:246)
>   at
> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:216)
>   at
> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1283)
>   at
> org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1238)
>   at
> org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1246)
>   at
> org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1368)
>
> 2010-03-18 16:09:43,059 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
> /************************************************************
> SHUTDOWN_MSG: Shutting down DataNode at hadoop0b10/192.168.60.100
> ************************************************************/
>
>

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