Ryan Blue created SPARK-16382:
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Summary: YARN - Dynamic allocation with spark.executor.instances
should increase max executors.
Key: SPARK-16382
URL: https://issues.apache.org/jira/browse/SPARK-16382
Project: Spark
Issue Type: Bug
Components: YARN
Reporter: Ryan Blue
SPARK-13723 changed the behavior of dynamic allocation when {{--num-executors}}
({{spark.executor.instances}}) is set. Rather than turning off dynamic
allocation, the value is used as the initial number of executors. This did not
change the behavior of {{spark.dynamicAllocation.maxExecutors}}. We've noticed
that some users set {{--num-executors}} higher than the max and the expectation
is that the max increases.
I think that either max should be increased, or Spark should fail and complain
that the executors requested is higher than the max.
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