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From "Xiaobing Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12957) Limit the number of outstanding async calls
Date Sun, 01 May 2016 05:35:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265616#comment-15265616
] 

Xiaobing Zhou commented on HADOOP-12957:
----------------------------------------

The previous format string is fine, but FindBugs just mistakingly thinks '%d\n' as '%n'. Patch
v010 is posted to have the change:
{code}
String errMsg = String.format(
            "Exceeded limit of max asynchronous calls: %d, " +
            "please configure %s to adjust it.",
            CommonConfigurationKeys.IPC_CLIENT_ASYNC_CALLS_MAX_DEFAULT,
            CommonConfigurationKeys.IPC_CLIENT_ASYNC_CALLS_MAX_KEY);
{code}

Thank you for review.

> 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, HADOOP-12957.004.patch,
HADOOP-12957.005.patch, HADOOP-12957.006.patch, HADOOP-12957.007.patch, HADOOP-12957.008.patch,
HADOOP-12957.009.patch, HADOOP-12957.010.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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