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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-16165) Decrease RpcServer.callQueueSize before writeResponse causes OOM
Date Wed, 14 Sep 2016 12:54:20 GMT

     [ https://issues.apache.org/jira/browse/HBASE-16165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Duo Zhang updated HBASE-16165:
------------------------------
    Affects Version/s: 1.4.0
                       1.3.0
                       2.0.0
                       1.1.6
                       1.2.3
                       0.98.22
               Labels: trivial  (was: )
        Fix Version/s: 1.2.4
                       0.98.23
                       1.1.7
                       1.4.0
                       1.3.0
                       2.0.0
          Component/s: rpc
                       IPC/RPC

> Decrease RpcServer.callQueueSize before writeResponse causes OOM
> ----------------------------------------------------------------
>
>                 Key: HBASE-16165
>                 URL: https://issues.apache.org/jira/browse/HBASE-16165
>             Project: HBase
>          Issue Type: Bug
>          Components: IPC/RPC, rpc
>    Affects Versions: 2.0.0, 1.3.0, 1.4.0, 1.1.6, 1.2.3, 0.98.22
>            Reporter: Duo Zhang
>            Assignee: Guanghao Zhang
>            Priority: Minor
>              Labels: trivial
>             Fix For: 2.0.0, 1.3.0, 1.4.0, 1.1.7, 0.98.23, 1.2.4
>
>         Attachments: HBASE-16165.patch
>
>
> In RpcServer, we use {{callQueueSizeInBytes}} to avoid queuing too many calls which causes
OOM. But in {{CallRunner.run}}, we decrease it before send the response back. And even after
calling {{sendResponseIfReady}}, the call object could stay in our heap for a long time if
we can not write out the response(That's why we need a Responder thread...). This makes it
possible that the actual size of all call object in heap is larger than {{maxQueueSizeInBytes}}
and causes OOM.



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