If you do two deploys concurrently, after the build you get:
ValidationError: Stack:arn:aws:cloudformation:us-east-1:132866487567:stack/dev2-praxis-site/b300e7e0-6c1a-11e7-a987-500c286e44d1 is in UPDATE_IN_PROGRESS state and can not be updated.
status code: 400, request id: d7ee05dd-6c85-11e7-8e2a-35196d4c28b9
Some friendlier options:
invalidate the cx deploy command if a release is currently promoting
If you do two deploys concurrently, after the build you get:
Some friendlier options:
cx deploycommand if a release is currently promoting