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Posted to issues@spark.apache.org by "Chenzhao Guo (JIRA)" <ji...@apache.org> on 2017/11/16 04:13:00 UTC

[jira] [Created] (SPARK-22537) Aggregation of map output statistics on driver faces single point bottleneck

Chenzhao Guo created SPARK-22537:
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             Summary: Aggregation of map output statistics on driver faces single point bottleneck
                 Key: SPARK-22537
                 URL: https://issues.apache.org/jira/browse/SPARK-22537
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.2.0
            Reporter: Chenzhao Guo


In adaptive execution, the map output statistics of all mappers will be aggregated after a stage is successfully executed. Driver takes the aggregation job while it will get slow when the number of mapper * shuffle partitions is large.



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