Command Not Implemented
The command is known but has not been implemented by this server.
502
502
Bad Gateway
The server, while acting as a gateway or proxy, received an invalid response from an upstream server.
syntax-error
The broker received a frame containing a command or arguments that do not conform to the AMQP syntax. This is a hard error and the connection is closed.
Bad Gateway
The server, while acting as a gateway or proxy, received an invalid response from the downstream server it accessed in attempting to fulfil the request.
Command not implemented
The server does not implement the command.