ClickHouse incident

CDC ClickPipes stuck in maintenance state

Resolved after 2 hours 42 minutes, affecting AWS ap-northeast-2 and AWS eu-west-1 and 1 more, on July 22, 2026.

resolved Jul 22, 2026, 02:36 PM UTC

The CDC ClickPipes upgrade rollout remains on hold while we confirm we can safely proceed without triggering the underlying pod networking failure mode that triggered the incident.

Started
Jul 22, 2026, 11:53 AM UTC
Resolved
Jul 22, 2026, 02:36 PM UTC
Duration
2h 42m
Detected by Pingoru
Jul 22, 2026, 11:53 AM UTC

Affected components

AWS ap-northeast-2AWS eu-west-1AWS us-east-2AWS ap-southeast-2AWS eu-central-1AWS ca-central-1AWS il-central-1

Update timeline

  1. investigating Jul 22, 2026, 11:53 AM UTC

    As part of our weekly upgrade process, CDC ClickPipes in eu-central-1 became stuck in maintenance state. The team is working on a mitigation.

  2. identified Jul 22, 2026, 12:36 PM UTC

    Services in eu-central-1 have recovered. We're in the process of manually recovering ~20 services in other regions.

  3. identified Jul 22, 2026, 01:05 PM UTC

    Most services have fully recovered. Continuing to roll out the fix to remaining 4 services (all in eu-central-1, us-east-2).

  4. monitoring Jul 22, 2026, 01:39 PM UTC

    All services have recovered; we will continue monitoring the affected nodes and consolidating our findings. Please reach out to our support team to request access to the RCA, when available.

  5. resolved Jul 22, 2026, 02:36 PM UTC

    The CDC ClickPipes upgrade rollout remains on hold while we confirm we can safely proceed without triggering the underlying pod networking failure mode that triggered the incident.

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