Sahil Takiar has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/14824 )

Change subject: IMPALA-9199: Add support for single query retries on cluster 
membership changes
......................................................................


Patch Set 13:

(2 comments)

addressed remaining comments

http://gerrit.cloudera.org:8080/#/c/14824/9/be/src/runtime/coordinator.cc
File be/src/runtime/coordinator.cc:

http://gerrit.cloudera.org:8080/#/c/14824/9/be/src/runtime/coordinator.cc@502
PS9, Line 502:           && !backend_state->exec_rpc_status().IsAborted())
> For this loop, do we have any expectation about the number of BackendStates
yeah, good point. fixed.


http://gerrit.cloudera.org:8080/#/c/14824/9/tests/custom_cluster/test_query_retries.py
File tests/custom_cluster/test_query_retries.py:

http://gerrit.cloudera.org:8080/#/c/14824/9/tests/custom_cluster/test_query_retries.py@93
PS9, Line 93: Increase the statestore
            :     heartbeat frequency so that the query actually fails during 
execution.
> It looks like we are using the default value for statestore_heartbeat_frequ
yeah - the tests infra actually sets a lower value for this: 
https://github.com/apache/impala/blob/master/tests/common/custom_cluster_test_suite.py#L59

yes, your understanding is correct. a RPC should fail which should cause the 
query to be retried.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I2e4a0e72a9bf8ec10b91639aefd81bef17886ddd
Gerrit-Change-Number: 14824
Gerrit-PatchSet: 13
Gerrit-Owner: Sahil Takiar <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Sahil Takiar <[email protected]>
Gerrit-Reviewer: Thomas Tauber-Marshall <[email protected]>
Gerrit-Comment-Date: Thu, 30 Apr 2020 12:53:15 +0000
Gerrit-HasComments: Yes

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