liuxian created SPARK-21506:
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Summary: The description of "spark.executor.cores" may be not
correct
Key: SPARK-21506
URL: https://issues.apache.org/jira/browse/SPARK-21506
Project: Spark
Issue Type: Bug
Components: Documentation
Affects Versions: 2.3.0
Reporter: liuxian
This description for "spark.executor.cores" :"The number of cores assigned to
each executor is configurable. When this is not explicitly set, only one
executor per application will run the same worker "
I think it is not correct, because if one application is not assigned enough
cores in the first `schedule()`, another executor may be launched on the same
worker in the next time.
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