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Posted to commits@hbase.apache.org by st...@apache.org on 2011/03/25 06:00:46 UTC
svn commit: r1085254 - /hbase/trunk/src/docbkx/book.xml
Author: stack
Date: Fri Mar 25 05:00:46 2011
New Revision: 1085254
URL: http://svn.apache.org/viewvc?rev=1085254&view=rev
Log:
HBASE-3622 Deadlock in HBaseServer (JVM bug?); Add an FAQ about hanging regionservers
Modified:
hbase/trunk/src/docbkx/book.xml
Modified: hbase/trunk/src/docbkx/book.xml
URL: http://svn.apache.org/viewvc/hbase/trunk/src/docbkx/book.xml?rev=1085254&r1=1085253&r2=1085254&view=diff
==============================================================================
--- hbase/trunk/src/docbkx/book.xml (original)
+++ hbase/trunk/src/docbkx/book.xml Fri Mar 25 05:00:46 2011
@@ -959,10 +959,10 @@ When I build, why do I always get <code>
</answer>
</qandaentry>
</qandadiv>
- <qandadiv><title>Loading</title>
+ <qandadiv><title>Runtime</title>
<qandaentry>
<question><para>
- Why do I see pauses when loading HBase?
+ Loading, why do I see pauses when loading HBase?
</para></question>
<answer>
<para>
@@ -971,6 +971,20 @@ When I build, why do I always get <code>
</para>
</answer>
</qandaentry>
+ <qandaentry>
+ <question><para>
+ Why does my RegionServer hang inexplicitly?
+ </para></question>
+ <answer>
+ <para>
+ Are you running an old JVM (< 1.6.0_u21?)? When you look at a thread dump,
+ does it look like threads are BLOCKED but no one holds the lock all are
+ blocked on? See <link xlink:href="https://issues.apache.org/jira/browse/HBASE-3622">HBASE 3622 Deadlock in HBaseServer (JVM bug?)</link>.
+ Adding <code>-XX:+UseMembar</code> to the HBase <varname>HBASE_OPTS</varname> in <filename>conf/hbase-env.sh</filename>
+ may fix it.
+ </para>
+ </answer>
+ </qandaentry>
</qandadiv>
</qandaset>
</appendix>