October 29, 2012 – Amazon states a hardware replacement at a Virginia data center that has been the site of other recent outages trigged a data collection bug that downed service for “a fraction” of its cloud customers early last week.

In a postmortem message posted Friday night, Amazon Web Service team members wrote that they would be rolling out fixes this week that include alarms for memory leaks, modified memory monitoring for storage servers, updated internal DNS configuration and a change to failover logic with its Elastic Block Store offering that led to “rapid deterioration” of service.

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