[Impala-ASF-CR] IMPALA-7542: fix find-fragment-instances to find all "root threads"

["Zoltan Borok-Nagy (Code Review)" <ge...@cloudera.org>]

Hello Lars Volker, Zoram Thanga, Impala Public Jenkins, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/11396

to look at the new patch set (#2).

Change subject: IMPALA-7542: fix find-fragment-instances to find all "root threads"
......................................................................

IMPALA-7542: fix find-fragment-instances to find all "root threads"

find-fragment-instances didn't show all the threads
that worked on some fragment instance. It missed the
top-level "root threads" that started working on the
fragment instances.

I modified the get_fragment_instances() function to
check the local ThreadDebugInfo object of the threads
instead of checking the parent thread's ThreadDebugInfo.

I tested it locally on a core file.

Change-Id: I35ae1a6b384b002b343689469f02ceabd84af1b6
---
M lib/python/impala_py_lib/gdb/impala-gdb.py
1 file changed, 5 insertions(+), 6 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/96/11396/2
-- 
To view, visit http://gerrit.cloudera.org:8080/11396
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I35ae1a6b384b002b343689469f02ceabd84af1b6
Gerrit-Change-Number: 11396
Gerrit-PatchSet: 2
Gerrit-Owner: Zoltan Borok-Nagy <bo...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Lars Volker <lv...@cloudera.com>
Gerrit-Reviewer: Zoram Thanga <zo...@cloudera.com>