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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12957) Limit the number of outstanding async calls
Date Thu, 28 Apr 2016 00:35:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15261301#comment-15261301
] 

Tsz Wo Nicholas Sze commented on HADOOP-12957:
----------------------------------------------

Thanks for the update.
- It seems releaseAsyncCall may not work if the asyncMode is changing between calls.  We need
to call releaseAsyncCall inside Future.get.
- Please add the new tests to TestAsyncIPC.  We don't need to create new file for TestAsycCallLimit.
- Please add some new tests to TestAsyncDFSRename (i.e. testing async rename).

> Limit the number of outstanding async calls
> -------------------------------------------
>
>                 Key: HADOOP-12957
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12957
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>            Reporter: Xiaobing Zhou
>            Assignee: Xiaobing Zhou
>         Attachments: HADOOP-12957-HADOOP-12909.000.patch, HADOOP-12957-combo.000.patch,
HADOOP-12957.001.patch, HADOOP-12957.002.patch, HADOOP-12957.003.patch
>
>
> In async RPC, if the callers don't read replies fast enough, the buffer storing replies
could be used up. This is to propose limiting the number of outstanding async calls to eliminate
the issue.



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