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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/11/16 04:23:00 UTC
[jira] [Commented] (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:comment-tabpanel&focusedCommentId=16254730#comment-16254730 ]
Apache Spark commented on SPARK-22537:
--------------------------------------
User 'gczsjdy' has created a pull request for this issue:
https://github.com/apache/spark/pull/19763
> 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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