https://community.cloudera.com/t5/Support-Questions/Hbase-region-servers-not-able-to-connect-to-master-after/m-p/198707#M160755 <P>Hi <A rel="user" href="https://community.cloudera.com/users/223/jelser.html" nodeid="223">@Josh Elser</A>, what i could see from this error </P><P>failed on local exception: org.apache.hadoop.hbase.ipc.CallTimeoutException::Call id=0, waitTime=10001, operationTimeout=10000 expired</P><P>is a timeout exception. The property for rpc timeout is having this value</P><P>&lt;property&gt; &lt;name&gt;hbase.rpc.timeout&lt;/name&gt; &lt;value&gt;1800000&lt;/value&gt; &lt;/property&gt; </P><P>Is there any other property that needs to be set. one more fact is we are having hbase setup in HA mode and after upgrade the service got restarted. so there is a change of hbase active master after restart.</P> Tue, 18 Apr 2017 18:30:06 GMT arunpoy 2017-04-18T18:30:06Z