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https://issues.apache.org/jira/browse/SPARK-4772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14250460#comment-14250460
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Josh Rosen commented on SPARK-4772:
-----------------------------------
I've merged this into {{branch-1.2}}, so this will be included in 1.2.1. Since
that was the last remaining backport, I'm marking this as Fixed.
> Accumulators leak memory, both temporarily and permanently
> ----------------------------------------------------------
>
> Key: SPARK-4772
> URL: https://issues.apache.org/jira/browse/SPARK-4772
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.0.0
> Reporter: Nathan Kronenfeld
> Assignee: Nathan Kronenfeld
> Labels: accumulators
> Fix For: 1.0.3, 1.3.0, 1.1.2, 1.2.1
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Accumulators.localAccums is cleared at the beginning of a task, and not at
> the end.
> This means that any locally accumulated values hang around until another task
> is run on that thread.
> If for some reason, the thread dies, said values hang around indefinitely.
> This is really only a big issue with very large accumulators.
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