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Posted to issues@spark.apache.org by "chenliang (JIRA)" <ji...@apache.org> on 2019/01/05 04:48:00 UTC
[jira] [Created] (SPARK-26543) Support the coordinator to
demerminte post-shuffle partitions more reasonably
chenliang created SPARK-26543:
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Summary: Support the coordinator to demerminte post-shuffle partitions more reasonably
Key: SPARK-26543
URL: https://issues.apache.org/jira/browse/SPARK-26543
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.3.2, 2.3.1, 2.3.0, 2.2.2, 2.2.1, 2.2.0
Reporter: chenliang
Fix For: 2.3.0
For SparkSQL ,when we open AE by 'set spark.sql.adapative.enable=true',the ExchangeCoordinator will introduced to determine the number of post-shuffle partitions. But in some certain conditions,the coordinator performed not very well, there are always some tasks retained and they worked with Shuffle Read Size / Records 0.0B/0 ,We could increase the spark.sql.adaptive.shuffle.targetPostShuffleInputSize to solve this,but this action is unreasonable as targetPostShuffleInputSize Should not be set too large.
We can filter the useless partition(0B) with ExchangeCoorditinator automatically
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