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Posted to common-issues@hadoop.apache.org by "Chris Nauroth (JIRA)" <ji...@apache.org> on 2013/06/27 06:39:19 UTC

[jira] [Created] (HADOOP-9674) RPC#Server#start does not block until server is fully initialized and listening

Chris Nauroth created HADOOP-9674:
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             Summary: 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
            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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