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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-21474) Make number of parallel fetches from a reducer configurable
Date Wed, 19 Jul 2017 18:30:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-21474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-21474:
------------------------------------

    Assignee: Apache Spark

> Make number of parallel fetches from a reducer configurable
> -----------------------------------------------------------
>
>                 Key: SPARK-21474
>                 URL: https://issues.apache.org/jira/browse/SPARK-21474
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 2.2.0
>            Reporter: Raajay Viswanathan
>            Assignee: Apache Spark
>            Priority: Minor
>              Labels: configuration-addition
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> Currently the number of parallel fetches is hard-coded to 5. As a result the size of
each fetch request is fixed at 1/5th of maxSizeInFlights. Since, chunks are requested in bursts
of fetchRequests; the size of a burst to a single shuffle service can be high for large maxSizeInFlight



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