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Posted to issues@hbase.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2013/07/16 00:14:49 UTC
[jira] [Commented] (HBASE-8944) Document workaround for
MiniDFSCluster exceptions when running tests
[ https://issues.apache.org/jira/browse/HBASE-8944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13709053#comment-13709053 ]
Hudson commented on HBASE-8944:
-------------------------------
SUCCESS: Integrated in HBase-TRUNK #4255 (See [https://builds.apache.org/job/HBase-TRUNK/4255/])
HBASE-8944. Document workaround for MiniDFSCluster exceptions when running tests (apurtell: rev 1503429)
* /hbase/trunk/src/main/docbkx/troubleshooting.xml
> Document workaround for MiniDFSCluster exceptions when running tests
> --------------------------------------------------------------------
>
> 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
> Fix For: 0.98.0
>
> Attachments: 8944.patch, 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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