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https://issues.apache.org/jira/browse/HBASE-8944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708811#comment-13708811
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David Williams commented on HBASE-8944:
---------------------------------------
Hi Andrew, yes, absolutely. And thanks for taking the time to check this out.
> 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
> Assignee: Andrew Purtell
> Attachments: 8944.patch
>
>
> 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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