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https://issues.apache.org/jira/browse/HADOOP-10279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14038480#comment-14038480
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Hadoop QA commented on HADOOP-10279:
------------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12651270/HADOOP-10279.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-common-project/hadoop-common.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/4122//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/4122//console
This message is automatically generated.
> Create multiplexer, a requirement for the fair queue
> ----------------------------------------------------
>
> Key: HADOOP-10279
> URL: https://issues.apache.org/jira/browse/HADOOP-10279
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Chris Li
> Assignee: Chris Li
> Attachments: HADOOP-10279.patch, HADOOP-10279.patch,
> WeightedRoundRobinMultiplexer.java, subtask2_add_mux.patch
>
>
> The Multiplexer helps the FairCallQueue decide which of its internal
> sub-queues to read from during a poll() or take(). It controls the penalty of
> being in a lower queue. Without the mux, the FairCallQueue would have issues
> with starvation of low-priority requests.
> The WeightedRoundRobinMultiplexer is an implementation which uses a weighted
> round robin approach to muxing the sub-queues. It is configured with an
> integer list pattern.
> For example: 10, 5, 5, 2 means:
> * Read queue 0 10 times
> * Read queue 1 5 times
> * Read queue 2 5 times
> * Read queue 3 2 times
> * Repeat
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