Why does Azure give me an intermittent Error 503. The service is unavailable?

Question

I have an Azure service that has been running for a long period of time. It builds a word or powerpoint document based on arguments in the request and returns a uri to the

Answer 1

503 error is simply shows that your application pool was inaccessible, it was intermittent because your application pool is restarting because the lack of resource (processor, memory, etc).

Scale up your instance (Cloud Services or VM) to get more resource for the application pool.