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Incident detail

2026-June-18 Service Incident

Resolved incidentMajor

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Timeline

Incident updates

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  1. Investigating

    Around 3:51 AM UTC we started experiencing lower iOS device availability in the EU-Central data center. Our team is actively investigating the root cause and working toward a resolution.

  2. Monitoring

    We have been experiencing device unavailability in our EU-Central-1 data center and have identified the root cause. We have taken remedial action and are currently monitoring.

  3. Resolved

    After taking remedial action, we are now seeing real devices available for testing in the EU-Central-1 data center. All services are fully operational.

  4. Resolved

    ### Dates:

    Thursday June 18 2026, 03:45 UTC - 06:45 UTC.

    ### What happened:

    Approximately 7% of iOS devices in our EU data center were temporarily unavailable for customer test sessions after a loss of power to the rack hosting them.

    ### Why it happened:

    The power circuit feeding the affected rack exceeded its capacity, and a protective breaker tripped to safeguard the line - cutting power to the devices on that rack until the circuit was restored.

    ### How we fixed it:

    The affected circuit was reset and power restored to the rack, returning the devices to customer service.

    ### What we are doing to prevent it from happening again:

    We are redistributing power load across affected racks, adding capacity monitoring with early-warning alerts ahead of circuit limits, and introducing a capacity review before new devices are deployed to a rack.