[rabbitmq-discuss] Weird error

Wed Dec 8 22:50:08 GMT 2010

On 08/12/2010 10:04PM, Pieter de Zwart wrote:
 > exception on TCP connection <0.5020.1> from 10.20.30.110:41033
 > {bad_header,<<65,77,81,80,0,0,9,1>>}

That's the broker complaining that it can't understand the AMQP 0-9-1 
handshake.

 > Broker is:
 > Status of node rabbit at dude002 ...
 > [{running_applications,[{rabbit,"RabbitMQ","1.7.2"},

And there's your problem. RabbitMQ 1.7.2 (indeed all 1.x versions) only 
speak 0-8.

Since:

 > Rabbitmq-c library is the same one we have been using forever.

...I assume that you've been using 2.x brokers until now but are now 
using an older broker version?

Cheers, Simon