Amazon has released a detailed postmortem and mea culpa about the partial outage of its cloud services platform last week and identified the culprit: A configuration error made during a network upgrade.
During this configuration change, a traffic shift "was executed incorrectly," Amazon said, noting that traffic that should have gone to a primary network was routed to a lower capacity one instead. The error occurred at 12:47 p.m. on April 21 and led to a partial outage that lingered through last weekend.
The outage sent a number of prominent Web sites offline, including Quora, Foursquare and Reddit, and renewed an industry-wide debate over the maturity of cloud services .
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Amazon Cloud Outage Was Triggered by Configuration Error
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