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https://issues.apache.org/jira/browse/HADOOP-10389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13997356#comment-13997356
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Binglin Chang commented on HADOOP-10389:
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bq. I think the performance is actually going to be pretty good
I am not worried about performance, it just may cause more redundant code, wait 
to see some code then:)
Speak of redundant code, there are too many redundant codes in xxx.call.c, is 
it possible to do this using functions rather than generating repeat code?

bq. The rationale behind call id in general is that in some future version of 
the Java RPC system, we may want to allow multiple calls to be "in flight" at 
once
I looked closely to the rpc code, looks like concurrent rpc is supported, unit 
test in TestRPC.testSlowRpc test this.


> Native RPCv9 client
> -------------------
>
>                 Key: HADOOP-10389
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10389
>             Project: Hadoop Common
>          Issue Type: Sub-task
>    Affects Versions: HADOOP-10388
>            Reporter: Binglin Chang
>            Assignee: Colin Patrick McCabe
>         Attachments: HADOOP-10388.001.patch, HADOOP-10389.002.patch, 
> HADOOP-10389.004.patch, HADOOP-10389.005.patch
>
>




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