Sailesh Mukil has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/10813 )

Change subject: IMPALA-7163: Implement a state machine for the QueryState class
......................................................................


Patch Set 8:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/10813/6/be/src/runtime/query-state.h
File be/src/runtime/query-state.h:

http://gerrit.cloudera.org:8080/#/c/10813/6/be/src/runtime/query-state.h@308
PS6, Line 308:
             :   /// Number of active fragment instances and coordinators for 
this query that may consume
             :   /// resources for query execution (i.e. threads, memory) on 
the Impala daemon.
             :   /// Query-wide execution resources for this query are released 
once this goes to zero.
             :   AtomicInt32 exec_resource_refcnt_;
             :
             :   /// Temporary files for this query (owned by obj_pool_). 
Non-null if spilling is
             :   /// enabled. Set in Pr
> Now that the patch has sunk in more, I think the state machine the query st
Yes, this is correct. With IMPALA-4063, we will report errors earlier in the 
lifecycle first (i.e. PREPARING errors before EXECUTING errors).

I think reasoning about errors earlier in the query lifecycle is easier than  
reasoning about errors hit first in terms of a timestamp.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Iec5670a7db83ecae4656d7bb2ea372d3767ba7fe
Gerrit-Change-Number: 10813
Gerrit-PatchSet: 8
Gerrit-Owner: Sailesh Mukil <[email protected]>
Gerrit-Reviewer: Bikramjeet Vig <[email protected]>
Gerrit-Reviewer: Dan Hecht <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Ho <[email protected]>
Gerrit-Reviewer: Sailesh Mukil <[email protected]>
Gerrit-Comment-Date: Fri, 27 Jul 2018 21:48:07 +0000
Gerrit-HasComments: Yes

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