[jira] [Created] (SPARK-19596) After a Stage is completed, all Tasksets for the stage should be marked as zombie

["Imran Rashid (JIRA)" <ji...@apache.org>]

Imran Rashid created SPARK-19596:
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             Summary: 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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