PubNub outage, 24 March 2026
Connectivity Issues Affecting a Subset of Subscriptions
- Started
- Resolved
- 24 Mar 2026, 21:12 UTC (after 52 min)
- Impact
- Not stated
- Affected
- Publish/Subscribe Service
Last update from PubNub
### **Problem Description, Impact, and Resolution** On March 24, 2026, at 19:27 UTC, one network shard experienced intermittent connectivity affecting a subset of customers. The affected users may have experienced elevated latency and temporary error responses related to their subscription requests. The instability was caused by an atypical surge in message volume within a shared processing environment that had improperly configured resource limits. This led to high resource utilization and triggered automated system restarts. PubNub Engineering resolved the issue by implementing the proper limits after expanding infrastructure capacity to accommodate the increased load. Service was fully...
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