CPU drain when trying to connect with wrong credentials.

[gekola]

amqplib calls callback function provided to connect twice in some cases (e.g. when trying to connect with wrong username/password). This leads to exponential growth of retries which drains CPU and hangs application completely if retries limit is not set.

[abreits]

It seems that the amqplib library returns multiple error callbacks when you connect with the wrong username/password, resulting in the behavior you describe. I have added a check to ignore the extra callbacks. I hope this solves the problem.

[gekola]

The fix works for me. Thanks a lot!