[jira] [Created] (HBASE-9481) Servershutdown handler get aborted with ConcurrentModificationException

["Jeffrey Zhong (JIRA)" <ji...@apache.org>]

Jeffrey Zhong created HBASE-9481:
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             Summary: Servershutdown handler get aborted with ConcurrentModificationException
                 Key: HBASE-9481
                 URL: https://issues.apache.org/jira/browse/HBASE-9481
             Project: HBase
          Issue Type: Bug
          Components: MTTR
            Reporter: Jeffrey Zhong
            Assignee: Jeffrey Zhong


In integration tests, we found SSH get aborted as following stack trace:
{code}
13/09/07 18:10:00 ERROR executor.EventHandler: Caught throwable while processing event M_SERVER_SHUTDOWN
java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
        at java.util.HashMap$ValueIterator.next(HashMap.java:822)
        at org.apache.hadoop.hbase.master.RegionStates.serverOffline(RegionStates.java:378)
        at org.apache.hadoop.hbase.master.AssignmentManager.processServerShutdown(AssignmentManager.java:3143)
        at org.apache.hadoop.hbase.master.handler.ServerShutdownHandler.process(ServerShutdownHandler.java:207)
        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:131)
        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:662)
{code}

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