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https://issues.apache.org/jira/browse/HADOOP-9674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Nauroth resolved HADOOP-9674.
-----------------------------------

    Resolution: Not A Problem

As per prior comments, this doesn't appear to be a real problem in practice, so 
I'm resolving it as not a problem.
                
> RPC#Server#start does not block until server is fully initialized and 
> listening
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-9674
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9674
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 3.0.0, 2.2.0
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>            Priority: Minor
>
> This problem was originally mentioned in discussion on HADOOP-8980.  When 
> calling {{RPC#Server#start}}, initialization of the server's internal 
> {{Listener}} and {{Reader}} threads happens in the background.  This 
> initialization is not guaranteed to complete by the time the caller returns 
> from {{RPC#Server#start}}.  This may be misleading to a caller that expects 
> the server has been fully initialized.  This problem sometimes manifests as a 
> test failure in {{TestRPC#testStopsAllThreads}}.  This test looks at the 
> stack frames of all running threads, expecting to find the {{Listener}} and 
> {{Reader}} threads, but sometimes it doesn't find them.

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