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From "Andrew Purtell (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4745) LRU Statistics thread should be daemon
Date Fri, 04 Nov 2011 01:03:32 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4745?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-4745:
----------------------------------

    Attachment: HBASE-4745.patch
    
> LRU Statistics thread should be daemon
> --------------------------------------
>
>                 Key: HBASE-4745
>                 URL: https://issues.apache.org/jira/browse/HBASE-4745
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>             Fix For: 0.92.0
>
>         Attachments: HBASE-4745.patch
>
>
> Here was from 'HBase 0.92/Hadoop 0.22 test results' discussion on dev@hbase
> {code}
> "LRU Statistics #0" prio=10 tid=0x00007f4edc7dd800 nid=0x211a waiting
> on condition [0x00007f4e631e2000]
>   java.lang.Thread.State: TIMED_WAITING (parking)
>        at sun.misc.Unsafe.park(Native Method)
>        - parking to wait for  <0x00007f4e88acc968> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
>        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
>        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
>        at java.util.concurrent.DelayQueue.take(DelayQueue.java:164)
>        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:583)
>        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:576)
>        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
>        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>        at java.lang.Thread.run(Thread.java:619)
> {code}
> We should make this thread daemon thread.

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