[GitHub] spark pull request: [SPARK-11082][YARN] Fix wrong core number when...

[jdesmet <gi...@git.apache.org>]

Github user jdesmet commented on the pull request:

    https://github.com/apache/spark/pull/9095#issuecomment-215998052
  
    From a user point of view the closure of this issue as-is is unacceptable. I cannot understand why one would allow wrong job accounting for the executors as reported in Yarn. This could affect the integrity of an entire cluster due to over scheduling. 
    
    Part of the discussion goes about explaining how to fix it with a different resource scheduler - of which I do not understand the details - but there was no documentation to be found. 
    
    I am looking at a pretty big cluster for a pretty big company with a lot of yarn scheduled jobs running on it - this worries me. It is pretty common to have executors running with 32 vcores or more, and when running with that much on one node - I have to be sure that yarn does not schedule anything else in.


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