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https://issues.apache.org/jira/browse/HBASE-4286?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesse Yates resolved HBASE-4286.
--------------------------------
Resolution: Fixed
This is fixed in trunk - closing as fixed.
> 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
> Labels: noob
>
> 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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