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From "Kay Ousterhout (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-19596) After a Stage is completed, all Tasksets for the stage should be marked as zombie
Date Fri, 24 Feb 2017 01:28:44 GMT

    [ https://issues.apache.org/jira/browse/SPARK-19596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15881726#comment-15881726
] 

Kay Ousterhout commented on SPARK-19596:
----------------------------------------

I agree that this is an issue (although it would be implicitly fixed if we cancel running
tasks in zombie stages, because that would mean that a task attempt from an earlier, still-running
stage attempt can't cause a stage to be marked as complete)

> After a Stage is completed, all Tasksets for the stage should be marked as zombie
> ---------------------------------------------------------------------------------
>
>                 Key: SPARK-19596
>                 URL: https://issues.apache.org/jira/browse/SPARK-19596
>             Project: Spark
>          Issue Type: Improvement
>          Components: Scheduler
>    Affects Versions: 2.2.0
>            Reporter: Imran Rashid
>
> Fetch Failures can lead to multiple simultaneous tasksets for one stage.  The stage may
eventually be finished by task completions from a prior stage attempt.  When this happens,
the most recent taskset is not marked as a zombie.  This means that taskset may continue to
submit new tasks even after the stage is complete.
> This is not a correctness issue, but it will effect performance, as cluster resources
will get tied up running tasks that are not needed.
> This is a follow up to https://issues.apache.org/jira/browse/SPARK-19565.  See some discussion
in the pr for that issue: https://github.com/apache/spark/pull/16901



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