[jira] [Commented] (SPARK-20084) Remove internal.metrics.updatedBlockStatuses accumulator from history files

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-20084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15941012#comment-15941012 ] 

Apache Spark commented on SPARK-20084:
--------------------------------------

User 'rdblue' has created a pull request for this issue:
https://github.com/apache/spark/pull/17412

> Remove internal.metrics.updatedBlockStatuses accumulator from history files
> ---------------------------------------------------------------------------
>
>                 Key: SPARK-20084
>                 URL: https://issues.apache.org/jira/browse/SPARK-20084
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core, Web UI
>    Affects Versions: 2.1.0
>            Reporter: Ryan Blue
>
> History files for large jobs can be hundreds of GB. These history files take too much space and create a backlog on the history server.
> Most of the size is from Accumulables in SparkListenerTaskEnd. The largest accumulable is internal.metrics.updatedBlockStatuses, which has a small update (the blocks that were changed) but a huge value (all known blocks). Nothing currently uses the accumulator value or update, so it is safe to remove it. Information for any block updated during a task is also recorded under Task Metrics / Updated Blocks.



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