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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4286) NPE when master shuts down during processing of server shutdowns
Date Mon, 29 Aug 2011 23:13:38 GMT
NPE when master shuts down during processing of server shutdowns
----------------------------------------------------------------

                 Key: HBASE-4286
                 URL: https://issues.apache.org/jira/browse/HBASE-4286
             Project: HBase
          Issue Type: Bug
            Reporter: Todd Lipcon


If the master shuts down while trying to process a server crash, it will escape out of the
loop trying to read META, and then the {{hris}} variable is null. This results in the following
NPE:

2011-08-29 16:05:52,436 INFO org.apache.hadoop.hbase.master.handler.ServerShutdownHandler:
Reassigning 0 region(s) that c0317.hal.cloudera.com,60020,1314658642935 was carrying (skipping
0 regions(s) that are already in transition)
2011-08-29 16:05:52,436 ERROR org.apache.hadoop.hbase.executor.EventHandler: Caught throwable
while processing event M_META_SERVER_SHUTDOWN
java.lang.NullPointerException
	at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:207)
	at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:156)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)


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