Tim Armstrong has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/12238 )

Change subject: IMPALA-8090: race when reusing ScanRange in test
......................................................................


Patch Set 2:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/12238/2/be/src/runtime/io/scan-range.cc
File be/src/runtime/io/scan-range.cc:

http://gerrit.cloudera.org:8080/#/c/12238/2/be/src/runtime/io/scan-range.cc@240
PS2, Line 240:     file_reader_->Close();
> This bug existed earlier as well, but FileReader::Close() is not idempotent
Ah good point. The Close() call in CancelInternal() actually means its unsafe 
to reuse scan ranges that hit an error. I think instead of trying to fix the 
whole issue I'll document it - product code doesn't reuse scan ranges in this 
way.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I3122e5b2efea60ffe82d780930301d5be108876b
Gerrit-Change-Number: 12238
Gerrit-PatchSet: 2
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Zoltan Borok-Nagy <borokna...@cloudera.com>
Gerrit-Comment-Date: Tue, 22 Jan 2019 19:59:44 +0000
Gerrit-HasComments: Yes

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