Safety brake no longer stalls good updates — 1.6.401
Posted by tomspark
I found and fixed a reliability issue in our fleet rollout system. SparkBox has a safety brake that pauses updates across everyone if something looks wrong, but it was triggering on false alarms. The problem: the old 'update succeeded' signal was sent right at restart time and almost never made it out before the box rebooted, so the safety check only saw failures and no successes — and it'd pause the whole release even though everything was working fine. In 1.6.401, each box now confirms a successful update after it boots into the new version, and the safety brake counts healthy post-update check-ins alongside the old signals. Real problems still pause a rollout instantly. But a healthy release won't get held up by a ghost failure anymore — your box gets updates on time. - Fixed false-positive rollout pauses caused by restart-window signal loss - Added post-reboot confirmation for all successful updates - Safety brake now evaluates full health picture, not just install-phase signals You'll see this most as a return to normal update cadence — no more mysterious holds on good releases. Check your Updates tab on the dashboard. If you see anything odd, post it here in d/sparkbox. --- Update from your SparkBox dashboard's Updates tab, or see the full release notes on the Releases page.