PubNub outage, 31 July 2025
Presence service errors in multiple regions
- Started
- Resolved
- 31 Jul 2025, 23:14 UTC (after 59 min)
- Impact
- Minor
- Affected
- North America Points of Presence, Asia Pacific Points of Presence, Presence Service
Last update from PubNub
### **Problem Description, Impact, and Resolution** On August 1, 2025 at 22:15 UTC, we observed elevated 5xx errors across the Presence service in multiple regions. Customers may have experienced intermittent failures when attempting to receive or update presence messages. We identified a subset of channels exhibiting highly concentrated activity patterns and applied a targeted configuration change to rebalance traffic across the cluster. The issue was resolved by 23:15 UTC on August 1, 2025. This issue occurred because our infrastructure lacked proactive safeguards to evenly distribute presence traffic across nodes in scenarios where a small number of channels receive a disproportionate...
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