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https://issues.apache.org/jira/browse/CURATOR-126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14077164#comment-14077164
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ASF GitHub Bot commented on CURATOR-126:
----------------------------------------

Github user Randgalt commented on the pull request:

    https://github.com/apache/curator/pull/23#issuecomment-50418758
  
    I pushed an update to the test that has an assert. I tested it with the old 
background thread code and the test fails. It succeeds with the new code.
    
    -JZ
    
    From: cammckenzie <notificati...@github.com>
    Reply: apache/curator <re...@reply.github.com>>
    Date: July 28, 2014 at 6:29:46 PM
    To: apache/curator <cura...@noreply.github.com>>
    Cc: Jordan Zimmerman <jor...@jordanzimmerman.com>>
    Subject:  Re: [curator] CURATOR-126: Fix race condition in 
CuratorFrameworkImpl.close() (#23)  
    
    I have pushed a unit test up onto the CURATOR-126 branch. Have a play with 
it, I still seem to be getting the error logged when running against the fix. 
Could be something bogus in the test though.
    
    —
    Reply to this email directly or view it on GitHub.


> IllegalStateException in performBackgroundOperation during close
> ----------------------------------------------------------------
>
>                 Key: CURATOR-126
>                 URL: https://issues.apache.org/jira/browse/CURATOR-126
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Framework
>    Affects Versions: 2.5.0
>            Reporter: Scott Blum
>            Assignee: Jordan Zimmerman
>             Fix For: 2.7.0
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> {code}
> [CuratorFramework-0] ERROR 
> org.apache.curator.framework.imps.CuratorFrameworkImpl  - Background 
> exception was not retry-able or retry gave up
> java.lang.IllegalStateException: Client is not started
>       at 
> com.google.common.base.Preconditions.checkState(Preconditions.java:176)
>       at 
> org.apache.curator.CuratorZookeeperClient.getZooKeeper(CuratorZookeeperClient.java:113)
>       at 
> org.apache.curator.framework.imps.CuratorFrameworkImpl.performBackgroundOperation(CuratorFrameworkImpl.java:807)
>       at 
> org.apache.curator.framework.imps.CuratorFrameworkImpl.backgroundOperationsLoop(CuratorFrameworkImpl.java:793)
>       at 
> org.apache.curator.framework.imps.CuratorFrameworkImpl.access$400(CuratorFrameworkImpl.java:57)
>       at 
> org.apache.curator.framework.imps.CuratorFrameworkImpl$4.call(CuratorFrameworkImpl.java:275)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at java.lang.Thread.run(Thread.java:744)
> {code}
> I see this sometimes during test runs; I believe this happens because 
> CuratorZookeeperClient.started gets set to false during shutdown, but the 
> backgroundOperation loop can still be running since shutting down the 
> backgroundOperation loop is inherently racy.



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