[Impala-ASF-CR] IMPALA-8401: SIGRTMIN initiates the graceful shutdown process

["Bikramjeet Vig (Code Review)" <ge...@cloudera.org>]

Hello Lars Volker, Tim Armstrong, Impala Public Jenkins, 

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

    http://gerrit.cloudera.org:8080/12973

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

Change subject: IMPALA-8401: SIGRTMIN initiates the graceful shutdown process
......................................................................

IMPALA-8401: SIGRTMIN initiates the graceful shutdown process

This patch enables a user that has access to the impalad process,
to initiate the graceful shutdown process with a deadline of one year
by sending SIGRTMIN signal to it.

Testing:
Added a relevant e2e test.

TODO: test the shutdown signal handeling on all supported OSes

Change-Id: I521ffd7526ac9a8a5c4996994eb68d6a855aef86
---
M be/src/common/init.cc
M be/src/common/init.h
M be/src/service/impalad-main.cc
M tests/custom_cluster/test_restart_services.py
4 files changed, 87 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/73/12973/2
-- 
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I521ffd7526ac9a8a5c4996994eb68d6a855aef86
Gerrit-Change-Number: 12973
Gerrit-PatchSet: 2
Gerrit-Owner: Bikramjeet Vig <bi...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Lars Volker <lv...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <ta...@cloudera.com>