[Hadoop Wiki] Update of "Hbase/Troubleshooting" by JeanDanielCryans

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The "Hbase/Troubleshooting" page has been changed by JeanDanielCryans.
http://wiki.apache.org/hadoop/Hbase/Troubleshooting?action=diff&rev1=43&rev2=44

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  fs.file-max = 32768
  }}}
    Run the commands {{{sysctl -p /etc/sysctl.conf}}} and {{{service network restart}}} to make the change immediately effective.
-  * Apply HDFS-127 (formerly HADOOP-4681) to your cluster or at least to the hadoop jar used by hbase.
-  * Try setting '''dfs.datanode.socket.write.timeout''' to zero (in hadoop 0.18.x -- See HADOOP-3831 for detail and why not needed in hadoop 0.19.x).  See the thread at [[http://mail-archives.apache.org/mod_mbox/hadoop-hbase-user/200810.mbox/%3C20126171.post@talk.nabble.com%3E|message from jean-adrien]] for some background.  Note, this is an hdfs client configuration so needs to be available in $HBASE_HOME/conf.  Making the change only in $HADOOP_HOME/conf is not sufficient.  Copy your amended hadoop-site.xml to the hbase conf directory or add this configuration to $HBASE_HOME/conf/hbase-site.xml.
-  * Try increasing '''dfs.datanode.handler.count''' from its default of 3. This is a server configuration change so must be made in $HADOOP_HOME/conf/hadoop-site.xml. Try increasing it to 10, then by additional increments of 10. It probably does not make sense to use a value larger than the total number of nodes in the cluster. 
  
  
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