Gives up when it hits Insufficient capacity. error

[krutisfood]

Running on a dedicated host we regularly see "insufficient capacity", Hammertime stopped starting instances once it hit this error once:

at Request.extractError (/var/task/node_modules/aws-sdk/lib/services/ec2.js:50:35)
at Request.callListeners (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:105:20)
at Request.emit (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:77:10)
at Request.emit (/var/task/node_modules/aws-sdk/lib/request.js:683:14)
at Request.transition (/var/task/node_modules/aws-sdk/lib/request.js:22:10)
at AcceptorStateMachine.runTo (/var/task/node_modules/aws-sdk/lib/state_machine.js:14:12)
at /var/task/node_modules/aws-sdk/lib/state_machine.js:26:10
at Request.<anonymous> (/var/task/node_modules/aws-sdk/lib/request.js:38:9)
at Request.<anonymous> (/var/task/node_modules/aws-sdk/lib/request.js:685:12)
at Request.callListeners (/var/task/node_modules/aws-sdk/lib/sequential_executor.js:115:18)
message: 'Insufficient capacity.',
code: 'InsufficientInstanceCapacity',
time: 2018-07-17T19:30:47.258Z,
requestId: 'a6b5cc6a-15ee-4b32-8976-e25a4fa73e1c',
statusCode: 500,
retryable: true }```

Not sure, potentially we could try starting in a different AZ? Or just retry/continue on partial failure?