Provider
HarnessIncident detail
Degraded Performance — Feature Flags in PROD2
Resolved incidentMinor1 affected service
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Timeline
Incident updates
Every update Harness posted, oldest to newest, exactly as it appeared on their official status page.
Investigating
We are currently investigating this issue.
Monitoring
A fix has been implemented and we are monitoring the results.
Resolved
This incident has been resolved.
Resolved
### Summary
On April 24, 2026, a large non-batched bulk DELETE operation on the prod-2 primary database triggered lock contention, causing Feature Flag API latency and hung queries across multiple customer SDKs.
### Impact
1. Slow SDK auth/init — SDKs took longer than expected to complete evaluations
2. Elevated latency across many FF APIs
3. Limited to Feature Flag module, prod-2
4. No Data loss
### Root Cause
A background cleanup job executed a non-batched, single-transaction delete causing lock contention and API latency spikes
Mitigation
Immediately terminated the offending queries.
### Next Steps / Action Items
To prevent such issues from happening again. we are working on
1. Enhanced alerting and observability on long running queries.
2. Permanently replace large single-transaction delete pattern with smaller batched deletes
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