Summary:

On October 30th of 2019 a high volume of specifically targeted requests were made, leading to a Denial of Service on the 3scale Developer Portal UI and Admin Portal UI. API traffic was not affected during the incident.

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Timeline:

• 30/10/2019 11:42 UTC Developer Portal UI and Admin Portal UI are down
• 30/10/2019 12:16 UTC Developer Portal UI and Admin Portal UI are up
• 30/10/2019 12:35 UTC Developer Portal UI and Admin Portal UI are down
• 30/10/2019 12:54 UTC Developer Portal UI and Admin Portal UI are up

Root cause:

A high volume of requests was made by an external agent, causing some expensive database queries that led to a denial of service of the 3scale Developer Portal UI and Admin Portal UI.

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Preventive Actions:

• Limit exposure of the affected queries
• Enhance queries so they have a lower CPU impact on the database