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Posted to common-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2014/01/14 23:59:21 UTC

[jira] [Created] (HADOOP-10233) RPC lacks output flow control

Daryn Sharp created HADOOP-10233:
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             Summary: RPC lacks output flow control
                 Key: HADOOP-10233
                 URL: https://issues.apache.org/jira/browse/HADOOP-10233
             Project: Hadoop Common
          Issue Type: Bug
          Components: ipc
    Affects Versions: 2.0.0-alpha, 3.0.0
            Reporter: Daryn Sharp
            Priority: Critical


The RPC layer has input flow control via the callq, however it lacks any output flow control.  A handler will try to directly send the response.  If the full response is not sent then it is queued for the background responder thread.  The RPC layer may end up queuing so many buffers that it "locks" up in GC.



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