Why I Am Getting Errors in RabbitMQ, Celery Logs After Changing RabbitMQ Guest User's Password ?

Issue

I'm getting errors in RabbitMQ and Celery logs after changing RabbitMQ guest user password using following command

# rabbitmqctl change_password guest password

Error messages in RabbitMQ logs:

2019-03-13 09:50:02.857 [error] <0.13853.2> Error on AMQP connection <0.13853.2> (127.0.0.1:43566 -> 127.0.0.1:5672, state: starting):
AMQPLAIN login refused: user 'guest' - invalid credentials

Error messages in awx-celeryd.log

[2019-03-13 09:51:26,924: ERROR/Beat] beat: Connection error: [Errno 104] Connection reset by peer. Trying again in 8.0 seconds...
[2019-03-13 09:51:37,927: ERROR/MainProcess] consumer: Cannot connect to amqp://guest:**@127.0.0.1:5672//: [Errno 104] Connection reset by peer.
Trying again in 10.00 seconds...