Changes / Upstash / Degraded Performance
Upstash: Critical incident: Degraded Performance
Summary
Upstash reported critical degraded performance affecting regional and Redis Global components from 2025-06-11 06:51 UTC to 2025-06-11 10:02 UTC (3 h 10 min). OS maintenance updates changed networking components and triggered restarts, causing EC2 nodes to fail health checks and disrupting high availability; a fix was implemented at 06-11 09:20 UTC.
Machine-written from the diff below (Sol; type: incident degradation). Check the diff before relying on it.
Major incidentLabel: degradation (model (Jev), 97%)Changed Detected Source: stspg.io (opens in new tab)
What changed
Before: not present
After: Degraded Performance
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After: critical
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After: postmortem
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After: 2025-06-11 06:51 UTC
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After: 2025-06-11 10:02 UTC
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After: Frankfurt, Germany (eu-central-1), Ireland (eu-west-1), London, UK (eu-west-2), Mumbai, India (ap-south-1), N. California, USA (us-west-1), N. Virginia, USA (us-east-1), Ohio, USA (us-east-2), Oregon, USA (us-west-2), Redis Global - Frankfurt, Germany (eu-central-1), Redis Global - Ireland (eu-west-1), Redis Global - London, UK (eu-west-2), Redis Global - Mumbai, India (ap-south-1), Redis Global - N. California, USA (us-west-1), Redis Global - N. Virginia, USA (us-east-1), Redis Global - Ohio, USA (us-east-2), Redis Global - Oregon, USA (us-west-2), Redis Global - São Paulo, Brazil (sa-east-1), Redis Global - Singapore (ap-southeast-1), Redis Global - Sydney, Australia (ap-southeast-2), Redis Global - Tokyo, Japan (ap-northeast-1), São Paulo, Brazil (sa-east-1), Singapore (ap-southeast-1), Sydney, Australia (ap-southeast-2), Tokyo, Japan (ap-northeast-1)
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After: We are currently investigating this issue.
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After: We are continuing to investigate this issue.
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After: A fix has been implemented and we are monitoring the results.
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After: This incident has been resolved.
Before: not present
After: A routine system maintenance operation at the OS level led to the application of system updates across multiple EC2 instances in our clusters in several AWS regions. These updates included changes to networking components, which inadvertently triggered restarts.
As a result, several EC2 nodes failed health checks and temporarily dropped out of the cluster, disrupting high availability and causing partial connectivity issues for some clients and operations.
We have since reproduced the issue in a controlled environment and verified the root cause. To prevent a recurrence, we are updating our node maintenance strategy to ensure greater control over the timing and impact of system-level changes and excluding networking components from automated upgrades.
First version of this incident archived by Rewindex. View the live incident (opens in new tab).
History of this incident
| When (UTC) | Change | Kind |
|---|---|---|
| Critical incident: Degraded Performance (this change) Upstash reported critical degraded performance affecting regional and Redis Global components from 2025-06-11 06:51 UTC to 2025-06-11 10:02 UTC (3 h 10 min). OS maintenance updates changed networking components and triggered restarts, causing EC2 nodes to fail health checks and disrupting high availability; a fix was implemented at 06-11 09:20 UTC. | Major incident |