Starting at 5:35 AM PDT we experienced power and network connectivity issues for some instances, and degraded performance for some EBS volumes in a single Availability Zone in the EU-WEST-1 Region. By 6:00 AM PDT, power and networking connectivity had been restored for affected instances and by 6:31 AM PDT, degraded performance for affected EBS volumes had been resolved. By 7:08 AM PDT, the vast majority of affected instances had fully recovered. The small number of remaining instances are hosted on hardware which was adversely affected by the loss of power. While we will continue to work to recover all affected instances and volumes, for immediate recovery, we recommend replacing any remaining affected instances or volumes if possible. The issue has been resolved and the service is operating normally.
We have seen improvement from the delay in job state transitions of AWS Batch Jobs in the US-EAST-1 Region and continue to work toward resolution.