Details
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Improvement
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Status: Resolved
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Major
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Resolution: Not A Problem
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2.3.0
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None
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None
Description
When i set the conf `spark.streaming.dynamicAllocation.enabled=true`, the conf `num-executors` can not be set. As a result, it will allocate default 2 executors and all receivers will be run on this 2 executors, there may not be redundant cpu cores for tasks. it will stuck all the time.
in my opinion, we should remove unnecessary restrict for streaming dynamic allocation. we can set `num-executors` and `spark.streaming.dynamicAllocation.enabled=true` together. when application starts, each receiver will be run on an executor.
