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HBASE-8944. Document workaround for MiniDFSCluster exceptions when running tests 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1503429 13f79535-47bb-0310-9956-ffa450edef68
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Andrew Kyle Purtell 2013-07-15 19:11:19 +00:00
parent 6dd73f74d6
commit 0279997340
1 changed files with 30 additions and 0 deletions
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src/main/docbkx/troubleshooting.xml
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@ -1107,6 +1107,36 @@ attribute to Maven (See <xref linkend="maven.build.hadoop" /> for more).
</para>
</section>
</section>
<section xml:id="trouble.tests">
<title>Running unit or integration tests</title>
<section xml:id="trouble.HDFS-2556">
<title>Runtime exceptions from MiniDFSCluster when running tests</title>
<para>If you see something like the following
<programlisting>...
java.lang.NullPointerException: null
at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes
at org.apache.hadoop.hdfs.MiniDFSCluster.&lt;init&gt;
at org.apache.hadoop.hbase.MiniHBaseCluster.&lt;init&gt;
at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster
at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
...</programlisting>
or
<programlisting>...
java.io.IOException: Shutting down
at org.apache.hadoop.hbase.MiniHBaseCluster.init
at org.apache.hadoop.hbase.MiniHBaseCluster.&lt;init&gt;
at org.apache.hadoop.hbase.MiniHBaseCluster.&lt;init&gt;
at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniHBaseCluster
at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster
...</programlisting>
... then try issuing the command <command>umask 022</command> before launching tests. This is a workaround for
<link xlink:href="https://issues.apache.org/jira/browse/HDFS-2556">HDFS-2556</link>
</para>
</section>
</section>
<section xml:id="trouble.casestudy">