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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8585) AssignmentManager should handle RejectedExecutionException
Date Tue, 21 May 2013 22:26:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13663490#comment-13663490
] 

Jimmy Xiang commented on HBASE-8585:
------------------------------------

In this case, I think we should put the event in the waiting list again.  We need to make
sure it is in the original position.

The other choice is to remove the event from the list only after it is submitted properly
at first. What do you say?
                
> AssignmentManager should handle RejectedExecutionException
> ----------------------------------------------------------
>
>                 Key: HBASE-8585
>                 URL: https://issues.apache.org/jira/browse/HBASE-8585
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>
> In test output, I noticed the following:
> {code}
> 2013-05-21 03:39:37,015 DEBUG [Thread-1446-EventThread] zookeeper.ZooKeeperWatcher(307):
master:35255-0x13ec52b4ce30000 Received ZooKeeper Event, type=NodeDataChanged, state=SyncConnected,
path=/hbase/region-in-transition/8b6ce00aafd483a6ed7a76425009ebf8
> 2013-05-21 03:39:37,015 ERROR [Thread-1446-EventThread] zookeeper.ClientCnxn$EventThread(521):
Error while calling watcher
> java.util.concurrent.RejectedExecutionException
>         at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:1768)
>         at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:767)
>         at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:658)
>         at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:78)
>         at org.apache.hadoop.hbase.master.AssignmentManager.zkEventWorkersSubmit(AssignmentManager.java:1136)
>         at org.apache.hadoop.hbase.master.AssignmentManager.handleAssignmentEvent(AssignmentManager.java:1306)
>         at org.apache.hadoop.hbase.master.AssignmentManager.nodeDataChanged(AssignmentManager.java:1095)
>         at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:338)
>         at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
>         at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
> {code}
> By default, ThreadPoolExecutor.AbortPolicy is used for zkEventWorkers, leading to the
above exception.
> We should examine the calls to zkEventWorkersSubmit() and devise proper handling for
RejectedExecutionException.

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