[jira] [Resolved] (MAPREDUCE-4365) Shipping Profiler Libraries by DistributedCache

["Jie Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jie Li resolved MAPREDUCE-4365.
-------------------------------

          Resolution: Fixed
    Target Version/s:   (was: 1.1.0)

One way is to include the profiler library into the job jar and use relative path like "../../foo.library" to locate it.

Thanks Deveraj, Sid, Vinod and everyone!
                
> 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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