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ship-stopper platform & cms 9 sources 2 min read

Cloudflare HTTP 502 Errors Hit Multiple Regions May 12-13

What happened

Cloudflare experienced a series of HTTP 502 errors across multiple regions between May 12-13, affecting customers in Hong Kong, San Jose CA, and Perth. The incidents began with HTTP 4xx and 502 errors in Perth on May 12 at 03:40 UTC, followed by simultaneous outages in Hong Kong and San Jose on May 13 starting around 14:27 UTC. Additional service disruptions hit Cloudflare's Browser Run API on May 13 at 20:22 UTC and email sending via Worker Binding from May 13 22:24 UTC through May 14 04:48 UTC. All incidents were resolved within hours, with the longest lasting approximately 6.5 hours.

Business impact

Enterprise websites using Cloudflare CDN likely experienced downtime or degraded performance during these windows, potentially causing revenue loss for e-commerce sites and customer access issues. Teams may have received false alerts about application problems when the root cause was Cloudflare infrastructure, leading to wasted debugging time and resources.

Background

HTTP 502 errors indicate communication failures between Cloudflare edge servers and origin servers, making websites completely inaccessible to users in affected regions. Cloudflare serves millions of websites globally, making regional outages particularly disruptive for enterprises with international traffic. The clustering of incidents across multiple regions and services within a 24-hour period suggests a broader infrastructure issue rather than isolated problems.

What this means for your team

Review your CDN monitoring to distinguish between origin server issues and CDN provider problems during incident response. Set up region-specific monitoring to detect when traffic patterns indicate CDN regional failures rather than application bugs. Consider implementing multi-CDN strategies for critical revenue-generating sites, and ensure your incident response playbooks include steps to verify CDN provider status before escalating to development teams.

What to watch

Monitor Cloudflare's transparency reports and status pages for any acknowledgment of systemic issues that could indicate ongoing infrastructure problems. Watch for whether similar multi-region clustering occurs again, which could signal deeper architectural issues requiring additional mitigation strategies.

Sources

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