Tim Armstrong has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/10488


Change subject: IMPALA-7062: fix unsafe RuntimeProfile::SortChildren() function
......................................................................

IMPALA-7062: fix unsafe RuntimeProfile::SortChildren() function

The API is inherently unsafe, because std::sort() can crash if a
comparator returns unstable results, e.g. because a profile
counter value changes. The generality of this function is both
unnecessary and dangerous.

The fix is to take a snapshot of the counter values and sort
based on the snapshot.

Change-Id: Ie456c87c34e7d75eb7482f499e90d50de740df40
---
M be/src/runtime/coordinator-backend-state.cc
M be/src/util/runtime-profile-test.cc
M be/src/util/runtime-profile.cc
M be/src/util/runtime-profile.h
4 files changed, 29 insertions(+), 24 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/88/10488/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ie456c87c34e7d75eb7482f499e90d50de740df40
Gerrit-Change-Number: 10488
Gerrit-PatchSet: 1
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>

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