Adesh Kumar Rao created HIVE-24201:

             Summary: WorkloadManager kills query being moved to different pool 
if destination pool does not have enough sessions
                 Key: HIVE-24201
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2, llap
    Affects Versions: 4.0.0
            Reporter: Adesh Kumar Rao
            Assignee: Nikhil Gupta

To reproduce, create a resource plan with move trigger, like below:
|                        line                        |
| experiment[status=DISABLED,parallelism=null,defaultPool=default] |
|  +  default[allocFraction=0.888,schedulingPolicy=null,parallelism=1] |
|      |  mapped for default                         |
|  +  pool2[allocFraction=0.1,schedulingPolicy=fair,parallelism=1] |
|      |  trigger t1: if (ELAPSED_TIME > 20) { MOVE TO pool1 } |
|      |  mapped for users: abcd                   |
|  +  pool1[allocFraction=0.012,schedulingPolicy=null,parallelism=1] |
|      |  mapped for users: efgh                   |
Now, run two queries in pool1 and pool2 using different users. The query 
running in pool2 will tried to move to pool1 and it will get killed because 
pool1 will not have session to handle the query.

Once killed this query needs to be re-run externally. It can be optimized and 
should be retried to run in destination pool directly(it will get queued and 
run once the session is alive).

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