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