Pain point · Reliability & bugs · Causes churn
Disk-full startup can erase config.json and reset settings
1 source thread · first seen 2026-09
Summary
If the disk fills while Mattermost persists its configuration during startup, config.json can be truncated. A subsequent startup treats the empty file as a new configuration and resets settings, requiring manual reconstruction.
- Affects
- Self-hosting administrators
- Workaround
- Rebuild the configuration by hand and reset the database password.
Evidence
Excerpts are copied word for word from the source; follow the link to read it in full.
“All of my config was gone. Mattermost started up with a fresh default config”