Increased 400 error rates

6:16 PM PDT We are investigating increased error rates for API requests talking to DynamoDB streams in the SA-EAST-1 Region.

6:34 PM PDT We have identified the root cause of increased 400 error rate for API requests talking to DynamoDB streams in the SA-EAST-1 Region. Restarting applications talking to streams will resolve the issue while we continue to work towards resolution.

7:43 PM PDT We are beginning to see recovery for the increased 400 error rate for API requests talking to DynamoDB streams in the SA-EAST-1 Region. Restarting applications talking to streams will resolve the issue while we continue to work towards full recovery.

9:59 PM PDT Between 3:50 PM and 9:53 PM PDT customers experienced increased 400 error rate for API requests talking to DynamoDB streams in the SA-EAST-1 Region. The issue has been resolved and the service is operating normally.