Sheriffing/Schedule for Tasks performed by Code Sheriffs

Version: 6 (Last Updated 2020-11-03)

Task	Schedule	Details
Watch trees	Always	Watch the following trees for failures, classify them, do backouts and escalate infra issues: trunk (mozilla-central, autoland) mozilla-beta mozilla-release mozilla-esr trees (all of them which are available in Treeherder; often there is only 1, but for some time 2 when their cycles overlap) Open them up to the oldest push with unclassified failures (excluding backfills and retriggers added >4h after the push) or running jobs.
Email reading	Start of shift, every 30 minutes	Help other people by answering needinfo requests etc.
Read new, not suggested bugs	Start of shift	Get used to new frequent failures created since the last shift and which Treeherder doesn’t suggest. These are added at the top and further down.
Land patches	Every 2h	Check for patches waiting to land
Merge autoland tree to mozilla-central	Mo-Fr every 6h Sa+Su: every 12h	Merge autoland to mozilla-central and mozilla-central to autoland if necessary
central-as-beta simulations	Weekends	Simulate the code in mozilla-central as mozilla-beta
Clean up list of bugs which don’t get suggested	Weekly	Check if bugs are still active or needed for beta. Preferable on the weekend when there is more time for this. Open the Bugzilla links from the document. If the bug has been resolved as incomplete, remove it from the document. If it is resolved fixed but the widget showing the number of classifications per day still shows activity, it is used for non-trunk trees (e.g. beta, release, esrs). Keep it in that case.

In the nights from

• Sunday to Monday
• Tuesday to Wednesday
• Thursday to Friday

the tasks which are required to ship beta builds to users run (e.g. creating builds other than US English, creating updates and verifying their correctness).

These tasks start at 21:00 UTC (= 23:00 Romanian time in winter, 00:00 in summer).

Exceptions are:

• Sunday to Monday when Monday is merge day: the beta build starts after the merge on Monday.
• week before release: release candidates get built instead and release management starts these manually.

Sometimes these beta builds are not part of the last 10 pushes which are shown by default by Treeherder. People starting a shift during which such a "release graph" for beta is supposed to run shall load pushes for mozilla-beta until they see a push with changes affecting also the US English Firefox (= usually the pushes from release management). These should get new running tasks after the aforementioned times. For the Sunday to Monday shift, this can be a push from Friday.

Failing tasks ("UV", "c-up", "L10n" etc.) should be rerun and escalated in the releaseduty channel on Matrix if they continue to fail.

Sheriffing and quality/stability related tasks executed by one person (Aryx)

Task	Schedule	Details
central-as-beta simulations	Mon-Fri	Simulate the code in mozilla-central as mozilla-beta
beta-as-release simulation	Thursdays	Simulate the code in mozilla-beta as mozilla-release
version increase simulation	Second Tuesday after version increase	The first time a version increase simulations is done is the second Tuesday after the version number got increased (to let probe-scraper alert for expiring probes before and reduced the failures in the version increase simulation), later as needed - at least a week before the next version increase to verify fixes worked and no new issues have been added. Simulate the code in mozilla-central with the next higher version number.
beta uplifts	on demand from Release Management	Check for patches to be uplifted from central to beta. Beta patches shall have landed and build and test coverage before 2am UTC on Mondays, Wednesdays and Fridays when betas are built. Release Management might request to land more on short notice.
Create new beta simulation document	Monday on which version got increased	Clone the current beta simulation document, adjust versions and dates and send it to code sheriffs and release management.
Request new version to be added to Bugzilla	Monday before next version increase	The Gecko and Firefox version will get increased and bugs cannot be set as fixed in the new version with the Bugherder tool until the version got added to bugzilla.mozilla.org. The new version gets requested one week in advance to allow easier coordination with the Bugzilla team. Example bug Clone the bug which added the latest version to Bugzilla.
Add new version to tree statistics	Monday on which version got increased	Tool which shows how often and how long the trees got closed code tool
Last cycle quality metrics	Monday on which version got increased	Accumulate weekly quality metrics for last release cycle
New Nightly respin statistics	Monday on which version got increased	Set up new sheet to track backouts from mozilla-central and Nightly respins