PubNub outage, 22 July 2025
Intermittent Presence Latency Spikes in FRA
- Started
- Resolved
- 22 Jul 2025, 18:18 UTC
- Impact
- Minor
Last update from PubNub
### **Problem Description, Impact, and Resolution** At 14:43 UTC on July 22, 2025, we observed elevated latency and service degradation in our Presence system in the FRA region, impacting customers' ability to receive timely presence events. We implemented changes in our infrastructure to mitigate the pressure on the system, and the incident ended at 15:06 UTC on July 22, 2025. Unfortunately, before we were able to conclusively determine and address the root cause, the issue re-occurred from 15:33 to 15:59 UTC on July 24, 2025. The failures started with an out-of-memory condition in some Presence service nodes. The root cause of the memory condition was a caching system-operated by a thir...
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