sujith71955 commented on issue #24036: [SPARK-27036][SPARK-SQL] Cancel the 
running jobs in the background if broadcast  future timeout error occurs
URL: https://github.com/apache/spark/pull/24036#issuecomment-471207820
 
 
   > Is it necessary to kill all these jobs? I get that they will probably fail 
without the broadcast, but, it's also possible they won't.
   You are right, the query will be failed, 
   but few   points i want to highlight here is,
   a) Broadcast job  which is running in the background may unnecessarily 
occupy the resources , even-though the query will fail in the end , so it will 
be better if we can cancel these useless jobs/tasks which we are not sure how 
much time it can run.
   b) Another point is regarding web ui, In UI broadcast job will be shown  as 
completed which may sipley mislead the user. 

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