2014-10-06 16:59:22,219 ERROR [MASTER_SERVER_OPERATIONS-a2424:20020-2] executor.EventHandler: Caught throwable while processing event M_SERVER_SHUTDOWN
java.lang.NullPointerException
at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:190)
at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)