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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/11/16 04:23:01 UTC

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

     [ https://issues.apache.org/jira/browse/SPARK-22537?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-22537:
------------------------------------

    Assignee: Apache Spark

> 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
>            Assignee: Apache Spark
>
> 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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