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https://issues.apache.org/jira/browse/HADOOP-12909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15188658#comment-15188658
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Vinod Kumar Vavilapalli commented on HADOOP-12909:
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This sounds related to some of the work [~sseth] was doing at HADOOP-11552.
> Support asynchronous RPC calls
> ------------------------------
>
> Key: HADOOP-12909
> URL: https://issues.apache.org/jira/browse/HADOOP-12909
> Project: Hadoop Common
> Issue Type: New Feature
> Components: ipc
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Xiaobing Zhou
>
> In ipc.Client, the underlying mechanism is already supporting asynchronous
> calls -- the calls shares a connection, the call requests are sent using a
> thread pool and the responses can be out of order. Indeed, synchronized call
> is implemented by invoking wait() in the caller thread in order to wait for
> the server response.
> In this JIRA, we change ipc.Client to support asynchronous mode. In
> asynchronous mode, it return once the request has been sent out but not wait
> for the response from the server.
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