GitHub user sitalkedia opened a pull request:
https://github.com/apache/spark/pull/19081
[SPARK-21834] Incorrect executor request in case of dynamic allocation
## What changes were proposed in this pull request?
killExecutor api currently does not allow killing an executor without
updating the total number of executors needed. In case of dynamic allocation is
turned on and the allocator tries to kill an executor, the scheduler reduces
the total number of executors needed ( see
https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala#L635)
which is incorrect because the allocator already takes care of setting the
required number of executors itself.
## How was this patch tested?
Ran a job on the cluster and made sure the executor request is correct
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sitalkedia/spark
skedia/oss_fix_executor_allocation
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19081.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #19081
----
commit 6cc5fab56110034e5221c40c5dfcc38e72f8c05a
Author: Sital Kedia <ske...@fb.com>
Date: 2017-08-29T02:29:27Z
[SPARK-21834] Incorrect executor request in case of dynamic allocation
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