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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-2220) balancer.Balancer: java.lang.NullPointerException while HADOOP_CONF_DIR is empty or wrong
Date Thu, 03 Dec 2015 21:33:11 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo Nicholas Sze resolved HDFS-2220.
---------------------------------------
    Resolution: Cannot Reproduce

Let's resolve this as Cannot Reproduce.

> balancer.Balancer: java.lang.NullPointerException while HADOOP_CONF_DIR is empty or wrong
> -----------------------------------------------------------------------------------------
>
>                 Key: HDFS-2220
>                 URL: https://issues.apache.org/jira/browse/HDFS-2220
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer & mover
>    Affects Versions: 0.20.204.0
>            Reporter: Rajit Saha
>
> When HADOOP_CONF_DIR is empty or wrongly set and balancer is called without proper --config
, in clientside STDOUT we get NPE.
> $ echo $HADOOP_CONF_DIR
> $ hadoop balancer
> Balancing took 46.0 milliseconds
> 11/06/13 05:14:04 ERROR balancer.Balancer: java.lang.NullPointerException
>         at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:136)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:176)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:206)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.getServiceAddress(NameNode.java:200)
>         at org.apache.hadoop.hdfs.server.balancer.Balancer.createNamenode(Balancer.java:911)
>         at org.apache.hadoop.hdfs.server.balancer.Balancer.init(Balancer.java:860)
>         at org.apache.hadoop.hdfs.server.balancer.Balancer.run(Balancer.java:1475)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>         at org.apache.hadoop.hdfs.server.balancer.Balancer.main(Balancer.java:811)
> I think it would be good to give more meaningful error messege instead of NPE



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