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https://issues.apache.org/jira/browse/HADOOP-2367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12558325#action_12558325
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Chris Douglas commented on HADOOP-2367:
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The patch no longer applies to trunk; could you update it?
Also:
* The IntegerRanges code in Configuration could use a test case
* Also in IntegerRanges, a check that start <= end is probably a good idea
* It might be useful to let the profiling string in TaskRunner be configurable
* IOUtils.copyBytes can probably replace some of downlaodProfile code, since
the profile output is printable
* Speculatively executed tasks are marked as killed, so that profiling
information won't be downloaded, but what of jobs killed by the user? Would an
option to download all profile information regardless of the event status be
useful?
> Get representative hprof information from tasks
> -----------------------------------------------
>
> Key: HADOOP-2367
> URL: https://issues.apache.org/jira/browse/HADOOP-2367
> Project: Hadoop
> Issue Type: New Feature
> Components: mapred
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Fix For: 0.16.0
>
> Attachments: profile-2.patch, profile.patch
>
>
> It would be great to get a representative (2 or 3) sample of builtin java
> profiler for a sample of maps and reduces. I'd store the information in the
> userlog directory and make it available in the local file system of the
> submitting application.
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