Bug 12717

Summary: [autobuilder2] - Buildbot stop never saw process goes away
Product: [Infrastructure] AutoBuilder Reporter: Aaron Chan <aaron.chun.yew.chan>
Component: autobuilderAssignee: Aaron Chan <aaron.chun.yew.chan>
Status: RESOLVED INVALID QA Contact: Aaron Chan <aaron.chun.yew.chan>
Severity: minor    
Priority: Medium CC: apoorv.sangal, bluelightning, infras.ab.watcher, Infras.watcher, pidge, richard.purdie, ross.burton, stephano
Version: unspecified   
Target Milestone: 4.99   
Hardware: x86   
OS: Multiple   
Whiteboard:
OS type for building Yocto: --- Type of Regression: Unknown (Hard to categorize)
Verified: Documentation change: Don't know

Description Aaron Chan 2018-04-26 20:01:02 UTC 
This is probably not a bug from autobuilder but rather from Buildbot itself.

I found this discussion along the way during my discovery - https://lists.buildbot.net/pipermail/devel/2006-October/001555.html

Hence this is what could happen, i gave up on permanent solution and resolve on my own workaround.

$ buildbot restart yocto-controller 
never saw process go away

$ ps -ef | grep twistd

user 6577  1522  1 10:19 ?        00:00:07 /usr/bin/python3 -c from twisted.scripts import twistd; twistd.run() --no_save --logfile=twistd.log --python=buildbot.tac
user 7536  4318  0 10:28 pts/2    00:00:00 grep --color=auto twistd

$ twistd-kill ~/yocto-controller restart


# Simple script to forcefully killed the reactor still running on the background.
#!/usr/bin -xe

BUILDBOT_PATH=$1
BUILDBOT_ACTION = $2

kill -9 `cat $BUILDBOT_PATH/twistd.pid`
buildbot $BUILDBOT_ACTION $BUILDBOT_PATH
Comment 1 Aaron Chan 2018-07-03 01:59:01 UTC 
This ticket is no longer needed as the issue is not with Yocto Projet but rather this threat should posted with devel-Buildbot community.
Comment 2 Aaron Chan 2018-07-03 02:01:03 UTC 
Resolve this ticket since its not a bug. Its basically to hightlight the issues observed when we moved from old Buildbot 0.8.8 into newer version Buildbot 1.1.+