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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8944) Runtime NullPointerException in MiniDFSCluster on CentOS and other Linux
Date Mon, 15 Jul 2013 18:12:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708760#comment-13708760
] 

Andrew Purtell commented on HBASE-8944:
---------------------------------------

Isn't this HDFS-2556? Try {{umask 022}} before running tests to confirm.
                
> Runtime NullPointerException in MiniDFSCluster on CentOS and other Linux
> ------------------------------------------------------------------------
>
>                 Key: HBASE-8944
>                 URL: https://issues.apache.org/jira/browse/HBASE-8944
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.6, 0.94.6.1
>            Reporter: David Williams
>
> The HBaseTestingUtility appears to have an unhandled NullPointerException in certain
environments.   It works on Apache HBase 0.94.6.1 on Mac OSX but not in certain Linux environments
such as CentOS. 
> In Java:
> {code}
> HBaseTestingUtility testingUtility = new HBaseTestingUtility();
> testingUtility.startMiniCluster(1);  // blows up on CentOS Linux but not Mac OSX
> {code}
> Creates this exception:
> {code}
> ERROR in (create-table) (MiniDFSCluster.java:426)
> Uncaught exception, not in assertion.
> expected: nil
>   actual: java.lang.NullPointerException: null
>  at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes (MiniDFSCluster.java:426)
>     org.apache.hadoop.hdfs.MiniDFSCluster.<init> (MiniDFSCluster.java:284)
>     org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster (HBaseTestingUtility.java:444)
>     org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:612)
>     org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:568)
>     org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster (HBaseTestingUtility.java:555)
> {code}
> I also created a stack overflow ticket here, with more info:
> http://stackoverflow.com/questions/17625938/hbase-minidfscluster-java-fails-in-certain-environments
> Steps to reproduce:
> 1.  Download a copy of CentOS
> 2.  Install Java
> 3.  Fire up a minicluster as part of the HBaseTestingUtility

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