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ClickHouse Cloud: CDC ClickPipes stuck in maintenance state

Impact: majorStatus: resolvedStarted Resolved (2.7 h)5 updatesSource: status.clickhouse.com (opens in new tab)
Summary

CDC ClickPipes became stuck in maintenance during a weekly upgrade, initially in eu-central-1, with services in other regions also affected. ClickHouse Cloud rated the incident major; it ran from 2026-07-22 11:53 UTC to 2026-07-22 14:36 UTC, lasting 2 h 42 min. Services recovered, but the upgrade rollout remained on hold pending confirmation it could avoid the underlying pod networking failure mode.

Machine-written from the archived incident (Sol). Check the timeline before relying on it.

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

Timeline of updates

  1. investigating

    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

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

  3. identified

    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

    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

    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.

Rewindex changes for this incident

Impact, status and times are the vendor’s own, as last archived. View on status.clickhouse.com (opens in new tab). ClickHouse Cloud profile · Recent ClickHouse Cloud incidents · Markdown · JSON