Puneet Gupta created LENS-1262:
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             Summary: Support adding Driver Completion Listener after rewrite 
and estimate operation(and before submit)
                 Key: LENS-1262
                 URL: https://issues.apache.org/jira/browse/LENS-1262
             Project: Apache Lens
          Issue Type: Improvement
            Reporter: Puneet Gupta
            Assignee: Puneet Gupta


LensDriver#registerDriverEventListener will not be useful if its added after 
queuing/submitting the query. This is because split sec queries and immediate 
failures can happen even before one is able to call registerDriverEventListener 
of driver and in this case events are lost.

As of now registerDriverEventListener is being done after submitting the query



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