Outage in Let's Encrypt

Degraded Performance for Production

Resolved Maintenance
May 09, 2023 - Started about 2 years ago - Lasted 2 days

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Outage Details

We noticed low success rates and slow responses around 14:19 UTC. Starting investigation.
Components affected
Let's Encrypt ocsp.root-x1.letsencrypt.org Let's Encrypt acme-v02.api.letsencrypt.org (Production)
Latest Updates ( sorted recent to last )
about 2 years ago - at 05/09/2023 02:40PM

We noticed low success rates and slow responses around 14:19 UTC. Starting investigation.

about 2 years ago - at 05/09/2023 03:10PM

Source of problem identified, traffic returning to normal. Monitoring the situation.

about 2 years ago - at 05/09/2023 04:29PM

Traffic has remained steady for the last hour and a half. Closing this incident.

about 2 years ago - at 05/09/2023 07:57PM

Earlier fix seems not to have addressed the problem. Seeing low success rates and slow responses again. Investigating.

about 2 years ago - at 05/09/2023 08:50PM

Still monitoring cause of alert. Traffic returned to normal since about 20:05 UTC.

about 2 years ago - at 05/09/2023 11:43PM

While we have not seen any recurrences of the slowness, we're going to leave this incident in the monitoring state overnight in case anything unexpected happens.

Latest Let's Encrypt outages

Let's Encrypt's API is temporarily offline - 2 months ago
Let's Encrypt is unable to validate domain names - 6 months ago
API Partial service disruption - 7 months ago
Temporary Certificate Issuance Halt - 7 months ago
API Partial Service Disruption - 8 months ago

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