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https://issues.apache.org/jira/browse/FLINK-10066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16578181#comment-16578181
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ASF GitHub Bot commented on FLINK-10066:
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StefanRRichter commented on issue #6500: [FLINK-10066] Keep only archived
version of previous executions
URL: https://github.com/apache/flink/pull/6500#issuecomment-412497332
Thanks for the review @zentol! Will merge.
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> Keep only archived version of previous executions
> -------------------------------------------------
>
> Key: FLINK-10066
> URL: https://issues.apache.org/jira/browse/FLINK-10066
> Project: Flink
> Issue Type: Improvement
> Components: JobManager
> Affects Versions: 1.4.3, 1.5.2, 1.6.0
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
> Labels: pull-request-available
>
> Currently, the execution vertex stores a limited amount of previous
> executions in a bounded list. This happens primarily for archiving purposes
> and to remember previous locations and allocation ids. We remember the whole
> execution to eventually convert it into an archived execution.
> This seems unnecessary and dangerous as we have observed that this strategy
> is prone to memory leaks in the job manager. With a very high vertex count or
> parallelism, remembering complete executions can become very memory
> intensive. Instead I suggest to eagerly transform the executions into the
> archived version before adding them to the list, i.e. only the archived
> version is ever still referenced after the execution becomes obsolete. This
> gives better control over which information about the execution should really
> be kept in memory.
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