[GitHub] spark issue #12524: [SPARK-12524][Core]DagScheduler may submit a task set fo...

[JoshRosen <gi...@git.apache.org>]

Github user JoshRosen commented on the issue:

    https://github.com/apache/spark/pull/12524
  
    Per [my comment on the JIRA](https://issues.apache.org/jira/browse/SPARK-14658?focusedCommentId=15870777&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15870777), I believe that this is _not_ a duplicate of #12436 as was originally suggested, so I'd propose that we revive discussion and review of this.
    
    @mridulm, I have logs from a reproduction which occurred on a Spark 2.1.0 production cluster, which I posted on the JIRA (https://issues.apache.org/jira/browse/SPARK-14658). I'm still not entirely sure what's happening here, but one clue comes from the fact that it's the _third_ submission of the task set which is failing. My hunch is that there's an invariant regarding overlapping original attempts and re-attempts which is violated when a re-attempt itself fails and is re-attempted again.
    
    /cc @kayousterhout and @markhamstra for review of this scheduler-related patch.


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