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https://issues.apache.org/jira/browse/MAPREDUCE-4365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403191#comment-13403191
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Robert Joseph Evans commented on MAPREDUCE-4365:
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@Jie on 1.0 that may work, but I don't know if we are exploding the job.jar for
2.0. I think we need to have a JIRA for creating the symlinks before launching
at least in 2.0.
> Shipping Profiler Libraries by DistributedCache
> -----------------------------------------------
>
> Key: MAPREDUCE-4365
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4365
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Affects Versions: 1.0.3
> Reporter: Jie Li
>
> Hadoop profiling is great for performance tuning and debugging, but currently
> we can only use Java built-in profilers such as HProf, and for other
> profilers we need to install them on all slave nodes first, which is
> inconvenient for large clusters and sometimes impossible for production
> clusters.
> Supporting shipping profiler libraries using DistributedCache will solve this
> problem. For example, in mapred.task.profile.params, we specify a profiler
> library from the DistributedCache using special place holders such as
> <foo.jar>, and Hadoop can look at the DistributedCache to replace <foo.jar>
> with the localized path before launching the child jvm.
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