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https://issues.apache.org/jira/browse/HADOOP-12909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15218874#comment-15218874
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Xiaobing Zhou commented on HADOOP-12909:
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Thanks [~szetszwo], v007 removed @Unstable and changed it to lowercase one.
> Change ipc.Client to support asynchronous 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
> Attachments: HADOOP-12909-HDFS-9924.000.patch,
> HADOOP-12909-HDFS-9924.001.patch, HADOOP-12909-HDFS-9924.002.patch,
> HADOOP-12909-HDFS-9924.003.patch, HADOOP-12909-HDFS-9924.004.patch,
> HADOOP-12909-HDFS-9924.005.patch, HADOOP-12909-HDFS-9924.006.patch,
> HADOOP-12909-HDFS-9924.007.patch
>
>
> 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, synchronous 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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