[jira] [Created] (SPARK-2269) Clean up and add unit tests for resourceOffers in MesosSchedulerBackend

["Patrick Wendell (JIRA)" <ji...@apache.org>]

Patrick Wendell created SPARK-2269:
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             Summary: Clean up and add unit tests for resourceOffers in MesosSchedulerBackend
                 Key: SPARK-2269
                 URL: https://issues.apache.org/jira/browse/SPARK-2269
             Project: Spark
          Issue Type: Bug
          Components: Mesos
            Reporter: Patrick Wendell


This function could be simplified a bit. We could re-write it without offerableIndices or creating the mesosTasks array as large as the offer list. There is a lot of logic around making sure you get the correct index into mesosTasks and offers, really we should just build mesosTasks directly from the offers we get back. To associate the tasks we are launching with the offers we can just create a hashMap from the slaveId to the original offer.

The basic logic of the function is that you take the mesos offers, convert them to spark offers, then convert the results back.

One thing we should check is whether Mesos guarantees that it won't give two offers for the same worker. That would make things much more complicated.



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