Sahil Takiar created IMPALA-9636:
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Summary: Retried queries that blacklist nodes should ensure they
don't run on the blacklisted node
Key: IMPALA-9636
URL: https://issues.apache.org/jira/browse/IMPALA-9636
Project: IMPALA
Issue Type: Sub-task
Reporter: Sahil Takiar
When a query is retried due to a node blacklisting event, there is no guarantee
that the retried query will *not* run on the blacklisted node. When a node is
blacklisted, it is only placed on the blacklist for a certain period of time
(the first time it is blacklisted I think it is only about 12 seconds). It is
possible that retrying the query takes a while (perhaps the query has to wait
in the admission control queue again). So it is possible that the retried query
will end up running on the node that it blacklisted during its original
attempt, which is probably unwise because that node caused the query to fail.
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