Jie Li created MAPREDUCE-4365:
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Summary: 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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