[jira] [Created] (HBASE-13988) Add exception handler for lease thread

["Liu Shaohui (JIRA)" <ji...@apache.org>]

Liu Shaohui created HBASE-13988:
-----------------------------------

             Summary: Add exception handler for lease thread
                 Key: HBASE-13988
                 URL: https://issues.apache.org/jira/browse/HBASE-13988
             Project: HBase
          Issue Type: Bug
    Affects Versions: 2.0.0
            Reporter: Liu Shaohui
            Assignee: Liu Shaohui
            Priority: Minor


In a prod cluster, a region server exited for some important 
threads were not alive. After excluding other threads from the log, we doubted the lease thread was the root. 

So we need to add an exception handler to the lease thread to debug why it exited in future.
 
{quote}
2015-06-29,12:46:09,222 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: One or more threads are no longer alive -- stop
2015-06-29,12:46:09,223 INFO org.apache.hadoop.ipc.HBaseServer: Stopping server on 21600
...
2015-06-29,12:46:09,330 INFO org.apache.hadoop.hbase.regionserver.LogRoller: LogRoller exiting.
2015-06-29,12:46:09,330 INFO org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Thread-37 exiting
2015-06-29,12:46:09,330 INFO org.apache.hadoop.hbase.regionserver.HRegionServer$CompactionChecker: regionserver21600.compactionChecker exiting
2015-06-29,12:46:12,403 INFO org.apache.hadoop.hbase.regionserver.HRegionServer$PeriodicMemstoreFlusher: regionserver21600.periodicFlusher exiting
{quote}




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