Resolved after 1 hour 50 minutes, on April 1, 2026.
The incident was caused by a transient issue following a recent upscale of the affected voice instance to a higher tier (performed the previous night). Post-upgrade validation (test calls and log checks) did not reveal any issues, and all other instances operated normally. Corrective action plan: 1\. Extend criteria of automatic fail-over in case of secondary disk mount failures 2\. Enhance post-scaling validation 3\. Verify SIP routing logic on Customer/Partner side to handle 5xx and 6xx SIP responses.
Update timeline
- identified Apr 01, 2026, 11:05 AM UTC
One of our voice servers suffered from having a full virtual drive which prevented it from accepting calls. During the time while the incident was ongoing, this voice server replied with an error response to any inbound SIP INVITE requests. .
- monitoring Apr 01, 2026, 11:15 AM UTC
We moved all Graia CCaaS tenants to an alternative voice server of the affected server group..
- resolved Apr 01, 2026, 12:55 PM UTC
This incident has been resolved..
- monitoring Apr 02, 2026, 02:19 PM UTC
The incident was caused by a transient issue following a recent upscale of the affected voice instance to a higher tier (performed the previous night). Post-upgrade validation (test calls and log checks) did not reveal any issues, and all other instances operated normally. Corrective action plan: 1\. Extend criteria of automatic fail-over in case of secondary disk mount failures 2\. Enhance post-scaling validation 3\. Verify SIP routing logic on Customer/Partner side to handle 5xx and 6xx SIP responses.
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