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Posted to issues@spark.apache.org by "Shixiong Zhu (JIRA)" <ji...@apache.org> on 2015/07/30 06:29:04 UTC

[jira] [Resolved] (SPARK-8860) RDDOperationScope.withScope should accept a list of accumulators to display in the web UI

     [ https://issues.apache.org/jira/browse/SPARK-8860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shixiong Zhu resolved SPARK-8860.
---------------------------------
    Resolution: Won't Fix

Sending accumulators to RDDOperationScope.withScope doesn't make sense because we cannot use the accumulator value directly.

We want to display the metrics in real-time, but the accumulator value is only updated when a task finishes. Note: we cannot update the accumulator value before a task finishes, because we cannot revert the changes when a task fails. See https://github.com/apache/spark/pull/7774 for an alternative approach to show metrics.

Therefore I'm going to close it.

> RDDOperationScope.withScope should accept a list of accumulators to display in the web UI
> -----------------------------------------------------------------------------------------
>
>                 Key: SPARK-8860
>                 URL: https://issues.apache.org/jira/browse/SPARK-8860
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Reynold Xin
>




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