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Posted to common-issues@hadoop.apache.org by "Yongjun Zhang (JIRA)" <ji...@apache.org> on 2019/02/26 23:14:00 UTC
[jira] [Comment Edited] (HADOOP-12909) Change ipc.Client to support
asynchronous calls
[ https://issues.apache.org/jira/browse/HADOOP-12909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16778680#comment-16778680 ]
Yongjun Zhang edited comment on HADOOP-12909 at 2/26/19 11:13 PM:
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Hi [~xiaobingo] and [~szetszwo],
Thanks for your work here. One question, when asynchronous mode RPC mode was introduced, seems the rpcTimeOut is removed from synchronous mode (see here), did I understand it correctly? and is that intended if so?
Thanks.
was (Author: yzhangal):
Hi [~xiaobingo],
Thanks for your work here. One question, when asynchronous mode RPC mode was introduced, seems the rpcTimeOut is removed from synchronous mode (see here), did I understand it correctly? and is that intended if so?
Thanks.
> 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
> Priority: Major
> Fix For: 2.8.0, 3.0.0-alpha1
>
> 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, HADOOP-12909-HDFS-9924.008.patch, HADOOP-12909-HDFS-9924.009.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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