amahussein opened a new pull request #2571:
URL: https://github.com/apache/hadoop/pull/2571


   It was noticed that some processes will remain running in the background 
after running TestDistributedShell.
   This PR is quick fix to avoid the situation when resources are not returned 
back to the system. This would lead to contention on memory and CPU resources 
causing some other unit tests too fail.
   
   P.S: TestDistributedShell needs to be split because it grew to around 30 
unit tests, which makes a large unit test vulnerable to timeout if it exceeds 
30 minutes. Probably we should have a separate Jira for this.
   


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