c5835cd2b1
* [MM-70290] Run app migrations locked to the master DB App migrations write rows and then read them back within the same function. Those read-backs resolve to GetReplica(), so on a licensed server with read replicas configured a replica that has not yet caught up returns zero rows and doAppMigrations aborts startup via mlog.Fatal. Reported after a 10.11.12 -> 11.7.8 upgrade on Aurora PostgreSQL with a reader endpoint, crashing on the Managed Category Properties Setup migration. Restarting is not a reliable workaround: the done flag is written before the failing read, so the short-circuit path re-runs the same replica read and a node can crash-loop while lag persists. Wrapping doAppMigrations in LockToMaster/UnlockFromMaster covers every read in both migration loops, including SqlPropertyGroupStore.Get and SearchPropertyFields, which take no context and so cannot be fixed by per-call-site routing. This mirrors the existing bulk import fix in app/import.go, which locks to master for the same reason while the server is serving live traffic. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * Expect LockToMaster in the setup-functions store mock doAppMigrations now locks the store to master, and it runs from NewServer, so every helper that builds a server on the mock store hit an unexpected-call panic. Registering both calls in GetMockStoreForSetupFunctions covers the app, app/email, app/platform and api4 helpers, which all share this mock. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com> Co-authored-by: Mattermost Build <build@mattermost.com>
Mattermost is an open core, self-hosted collaboration platform that offers chat, workflow automation, voice calling, screen sharing, and AI integration. This repo is the primary source for core development on the Mattermost platform; it's written in Go and React, runs as a single Linux binary, and relies on PostgreSQL. A new compiled version is released under an MIT license every month on the 16th.
Deploy Mattermost on-premises, or try it for free in the cloud.
Learn more about the following use cases with Mattermost:
Other useful resources:
- Download and Install Mattermost - Install, setup, and configure your own Mattermost instance.
- Product documentation - Learn how to run a Mattermost instance and take advantage of all the features.
- Developer documentation - Contribute code to Mattermost or build an integration via APIs, Webhooks, slash commands, Apps, and plugins.
Table of contents
- Install Mattermost
- Native mobile and desktop apps
- Get security bulletins
- Get involved
- Learn more
- License
- Get the latest news
- Contributing
Install Mattermost
- Download and Install Mattermost Self-Hosted - Deploy a Mattermost Self-hosted instance in minutes via Docker, Ubuntu, or tar.
- Get started in the cloud to try Mattermost today.
- Developer machine setup - Follow this guide if you want to write code for Mattermost.
Other install guides:
- Deploy Mattermost on Docker
- Mattermost Omnibus
- Install Mattermost from Tar
- Ubuntu 20.04 LTS
- Kubernetes
- Helm
- More server install guides
Native mobile and desktop apps
In addition to the web interface, you can also download Mattermost clients for Android, iOS, Windows PC, macOS, and Linux.
Get security bulletins
Receive notifications of critical security updates. The sophistication of online attackers is perpetually increasing. If you're deploying Mattermost it's highly recommended you subscribe to the Mattermost Security Bulletin mailing list for updates on critical security releases.
Get involved
- Contribute to Mattermost
- Find "Help Wanted" projects
- Join Developer Discussion on a Mattermost server for contributors
- Get Help With Mattermost
Learn more
- API options - webhooks, slash commands, drivers, and web service
- See who's using Mattermost
- Browse over 700 Mattermost integrations
License
See the LICENSE file for license rights and limitations.
Get the latest news
- X - Follow Mattermost on X, formerly Twitter.
- Blog - Get the latest updates from the Mattermost blog.
- Facebook - Follow Mattermost on Facebook.
- LinkedIn - Follow Mattermost on LinkedIn.
- Email - Subscribe to our newsletter (1 or 2 per month).
- Mattermost - Join the ~contributors channel on the Mattermost Community Server.
- IRC - Join the #matterbridge channel on Freenode (thanks to matterircd).
- YouTube - Subscribe to Mattermost.
Contributing
Please see CONTRIBUTING.md. Join the Mattermost Contributors server to join community discussions about contributions, development, and more.