Sheriffing@Mozilla – Sheriffing and Backouts
April 3rd, 2017 by cbookHi,
Keeping the code trees [1] green (meaning free of build or test failures,
regressions, and minimizing intermittent test failures) is the daily
goal of sheriffing.
In order to reach this goal, this means we sometimes have to back out (revert)
changes made by developers. While this is a part of our job, we don’t do
it easily or without reason.
Backouts happen mostly for:
-> Bustage (i.e. Firefox no longer
successfully builds)
-> Test failures caused by a specific change
-> Issues reported by the community, like startup crashes or severe
regressions (these backouts often lead to new nightly builds being
created as well)
-> Performance regressions or memory leaks
-> Issues that block merges like merge-conflicts (like for a mozilla-inbound to mozilla-central merge)
For our primary integration repositories (where our developers land most
their changes), our workflow depends on which repository the problem is
on.
Mozilla-Inbound
-> Close Mozilla-Inbound if needed (preventing
developers from landing any further changes until the problem is
resolved)
-> Try to notify the responsible developer so that they
are aware of the problem caused by their patch
-> If possible, we
accept follow-up patches to fix the problem. This allows us to fail
forward and avoid running extra jobs that require more CPU time and
therefore increase costs.
-> If we don’t get response from the developer within a short
timeframe like 5 minutes, we back out the change and comment in the
bug with a reason for the backout (for example, including a link to the
failure log) and a needinfo to the assigne, to make sure the bug don’t get lost.
Autoland
-> Changesets that cause problems are backed out immediately –
no follow-ups as described above are possible (only the sheriffs can push manually to
autoland)
In any case, backouts are never meant to be personal and it’s part of
our job to try our best to keep our trees open for developers. We also
try to provide as much information as possible in the bug for why we
backed out a change.
Of course, we also make mistakes and it could be that we backed out
changesets that were innocent (like in a case where its not 100% clear
what caused the problem), but we try our best.
If you feedback or ideas how we can make things better, let me know.
Cheers,
– Tomcat
[1] Trees: The tree contains the source code as well as the code required to build each project on supported platforms (Linux, Windows, macOS, etc) and tests for various areas. Sheriffs take care of Firefox Code Trees like mozilla-central, mozilla-inbound, autoland, mozilla-aurora, mozilla-beta and mozilla-esr45/52 – our primary tool is treeherder and can be found here
July 2nd, 2019 at 3:24 am
buy proxies
I found a great…
July 2nd, 2019 at 3:55 am
seo proxies
I found a great…
July 2nd, 2019 at 5:06 am
sneaker proxies
I found a great…
July 6th, 2019 at 5:41 pm
best juice for Clouds
Tomcat's Blog » Blog Archive » Sheriffing@Mozilla – Sheriffing and Backouts
July 8th, 2019 at 4:52 pm
Alumni.uprima.ac.id
Tomcat's Blog » Blog Archive » Sheriffing@Mozilla – Sheriffing and Backouts
July 17th, 2019 at 12:15 am
http://Kleo.Icati-Youth.Org
Tomcat
July 21st, 2019 at 11:02 am
kleo.icati-youth.Org
Tomcat
July 22nd, 2019 at 2:27 am
where to buy proxies
I found a great…
July 25th, 2019 at 6:44 am
Hello, its nice paragraph concerning media print, we all understand media is a enormous source of facts.
July 28th, 2019 at 12:57 am
Healthcare administration degree
Tomcat's Blog » Blog Archive » Sheriffing@Mozilla – Sheriffing and Backouts
July 28th, 2019 at 5:07 am
how to make cannabis oil for Vape
Tomcat
July 28th, 2019 at 9:29 am
psoriasis symptoms
Tomcat
July 28th, 2019 at 9:36 am
sciatica cure
Tomcat
July 28th, 2019 at 11:17 am
cloud Vape pen for sale
Tomcat
July 28th, 2019 at 12:05 pm
ulcerative colitis treatment in india
Tomcat
July 28th, 2019 at 2:20 pm
lichen planus cure
Tomcat
July 28th, 2019 at 3:06 pm
blocked fallopian tubes natural treatment
Tomcat
July 28th, 2019 at 8:40 pm
cbd vape juice Review
Tomcat
July 29th, 2019 at 4:38 am
parkinson’s disease signs and symptoms
Tomcat
July 29th, 2019 at 3:14 pm
epilepsy bracelet
Tomcat
July 29th, 2019 at 5:36 pm
interstitial cystitis
Tomcat
August 1st, 2019 at 2:42 pm
Chester Lapid
I found a great…
August 1st, 2019 at 3:27 pm
Michel Mowen
I found a great…
August 1st, 2019 at 4:35 pm
Starla Respass
I found a great…
August 1st, 2019 at 5:56 pm
situs poker idn
Tomcat's Blog » Blog Archive » Sheriffing@Mozilla – Sheriffing and Backouts
August 2nd, 2019 at 4:17 am
Winifred Randahl
I found a great…
August 2nd, 2019 at 11:23 am
Deeann Shrewsbury
I found a great…
August 2nd, 2019 at 3:28 pm
Kurt Seilhamer
I found a great…
August 2nd, 2019 at 4:42 pm
Andre Goeser
I found a great…
August 3rd, 2019 at 12:16 am
http://Kleo.icati-youth.org/groups/cbd-vape-juice-benefits-for-discomfort-And-rest-171835833/
Tomcat
August 7th, 2019 at 10:46 am
http://www.adamziani.com
Tomcat
August 7th, 2019 at 2:43 pm
have a peek here
Tomcat
August 9th, 2019 at 2:15 pm
The last time the New York Botanical Backyard hosted a blooming corpse flower
was in 1939 , and the garden’s employees has been cultivating this
flower for nearly a decade.
August 10th, 2019 at 5:31 pm
The Gideon Pressurized Compact Fabric Steamer heats up incredibly quickly and includes a heating system , in under 15 seconds.
POWERFUL – The Gideon Pressurized Compact Fabric Steamer heats up and comes with a heating system that is powerful 1500 watts in under 15 seconds.
Best Gideon Pressurized Compact Fabric Steamer Robust
Steamer with Quick Heat-up – Four Convenient Attachments – Perfect for Travel and Home Use Cheap.
It does not hurt you to try or purchase Gideon Pressurized Compact Fabric Steamer
Robust Steamer with Quick Heat-up – Four Convenient Attachments – Perfect for Home and Travel Use.
COMPACT & PORTABLE – Perfect for home or travel; fits into a bag for use when traveling when needed and can likewise be stored away for convenient accessibility and being compact in size.
The compact design save easily and makes the fabric travel.
The fabric steamer is different from others, it owns a baffle
to avoid water spray. This iron steamer can stem Just when you move the temperature control button to max, could.
August 18th, 2019 at 3:37 pm
Granddaughter Loved This Birthday Association.