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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hbase/Troubleshooting" by ToddLipcon
Date Tue, 13 Apr 2010 22:58:17 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The "Hbase/Troubleshooting" page has been changed by ToddLipcon.
http://wiki.apache.org/hadoop/Hbase/Troubleshooting?action=diff&rev1=40&rev2=41

--------------------------------------------------

   1. [[#15|Problem: General operating environment issues -- zookeeper session timeouts, regionservers
shutting down, etc.]]
   1. [[#16|Problem: Scanner performance is low]]
   1. [[#17|Problem: My shell or client application throws lots of scary exceptions during
normal operation]]
+  1. [[#18]Problem: The HBase or Hadoop daemons crash after some days of uptime with no errors
logged]]
  
  
  <<Anchor(1)>>
@@ -284, +285 @@

  On your clients, edit $HBASE_HOME/conf/log4j.properties and change this: {{{log4j.logger.org.apache.hadoop.hbase=DEBUG}}}
  to this: {{{log4j.logger.org.apache.hadoop.hbase=INFO}}}, or even {{{log4j.logger.org.apache.hadoop.hbase=WARN}}}
.
  
+ <<Anchor(18)>>
+ == 18. Problem: The HBase or Hadoop daemons crash after some days of uptime with no errors
logged ==
+ === Causes ===
+ HBase and Hadoop have stability issues on certain versions of the JVM that can cause this
issue. In particular, Sun Java 1.6.0_18 is known to be buggy. The current recommended version
for production usage is 1.6.0_16.
+ === Resolution ===
+ Downgrade your JVM to 1.6.0_16.
+ 

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