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https://issues.apache.org/jira/browse/MAPREDUCE-6473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14768957#comment-14768957
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Hadoop QA commented on MAPREDUCE-6473:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | patch | 0m 0s | The patch command could not apply
the patch during dryrun. |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12756253/MAPREDUCE-6473-v2.patch
|
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / bf2f2b4 |
| Console output |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5995/console |
This message was automatically generated.
> Job submission can take a long time during Cluster initialization
> -----------------------------------------------------------------
>
> Key: MAPREDUCE-6473
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6473
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: performance
> Reporter: Kuhu Shukla
> Assignee: Kuhu Shukla
> Attachments: 99%ile.png, MAPREDUCE-6473-PerfTest.txt,
> MAPREDUCE-6473-v1.patch, MAPREDUCE-6473-v2.patch, avgtime.png
>
>
> During initialization in Cluster.java, the framework provider classes are
> loaded inside a sync block which can considerably increase job submission
> time when the number of submissions are high. The motive is to reduce time
> spent in this sync block safely to improve performance.
> {noformat}
> synchronized (frameworkLoader) {
> for (ClientProtocolProvider provider : frameworkLoader) {
> LOG.debug("Trying ClientProtocolProvider : "
> + provider.getClass().getName());
> {noformat}
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