Just want to make a not for myself regarding the errors you might get in case of AWS outage or service degradation. It is what we got on June 22, 2017.

We currently do not have sufficient capacity in the region you requested.
{
"errorMessage": "We currently do not have sufficient capacity in the region you requested. Our system will be working on provisioning additional capacity. You can avoid getting this error by temporarily reducing your request rate.",
"errorType": "ServiceException",
"stackTrace": [
"Object.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/json.js:48:27)",
"Request.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/rest_json.js:37:8)",
"Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20)",
"Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10)",
"Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:678:14)",
"Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)",
"AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)",
"/var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10",
"Request. (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)",
"Request. (/var/runtime/node_modules/aws-sdk/lib/request.js:680:12)"
]
}
InternalFailure
{
"errorMessage": null,
"errorType": "InternalFailure",
"stackTrace": [
"Object.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/json.js:48:27)",
"Request.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/rest_json.js:37:8)",
"Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20)",
"Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10)",
"Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:678:14)",
"Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)",
"AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)",
"/var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10",
"Request. (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)",
"Request. (/var/runtime/node_modules/aws-sdk/lib/request.js:680:12)"
]
}
ServiceUnavailableException
{
"errorMessage": null,
"errorType": "ServiceUnavailableException",
"stackTrace": [
"Object.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/json.js:48:27)",
"Request.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/rest_json.js:37:8)",
"Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:105:20)",
"Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:77:10)",
"Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:678:14)",
"Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)",
"AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)",
"/var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10",
"Request. (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)",
"Request. (/var/runtime/node_modules/aws-sdk/lib/request.js:680:12)"
]
}