agrawaldevesh opened a new pull request #29032:
URL: https://github.com/apache/spark/pull/29032


   ### What changes were proposed in this pull request?
   
   This PR is a giant plumbing PR that plumbs a DecommissionInfo along
   with the DecommissionExecutor message.
   
   ### Why are the changes needed?
   
   The motivation is to know whether a decommissioned executor would also
   be loosing shuffle files -- and thus it is important to know whether the
   worker (node) would also be decommissioned. This is similar to the
   existing `workerLost` field in the `SlaveLost` message.  We can also 
embellish DecommissionInfo
   in the future for knowing how long the executor has (for spot kills) and
   the like.
   
   ### Does this PR introduce _any_ user-facing change?
   No
   
   ### How was this patch tested?
   Tweaked an existing unit test in `AppClientSuite`


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