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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4797) RPC Server can leave a lot of direct buffers
Date Sat, 06 Dec 2008 02:23:44 GMT
RPC Server can leave a lot of direct buffers 
---------------------------------------------

                 Key: HADOOP-4797
                 URL: https://issues.apache.org/jira/browse/HADOOP-4797
             Project: Hadoop Core
          Issue Type: Bug
          Components: ipc
    Affects Versions: 0.17.0
            Reporter: Raghu Angadi
            Assignee: Raghu Angadi



RPC server unwittingly can soft-leak direct buffers. One observed case is that one of the
namenodes at Yahoo took 40GB of virtual memory though it was configured for 24GB memory. Most
of the memory outside Java heap expected to be direct buffers. This shown to be because of
how RPC server reads and writes serialized data. The cause and proposed fix are in following
comment.

  

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