[rabbitmq-discuss] Java client: channel synchronization deadlock?

Mon Dec 15 12:21:57 GMT 2008

Hi Jonathan,

Jonathan McGee wrote:
> [...] the following code causes a deadlock:
> synchronized(channel) { channel.queueDeclare("foo"); }
> It appears this is because the RabbitMQ client does its own locking  
> on "this" internally.

*facepalm*

Excellent observation. Thanks for pointing this out. We're fixing it now
-- the fix will (modulo unforeseen problems) be in the 1.5.0 release.

> (As a side note, the guide also indicates that you must obtain a  
> ticket to access a Channel, but this doesn't seem to be required  
> anymore.)

That'll be changed with this upcoming release.

Regards,
  Tony
-- 
 [][][] Tony Garnock-Jones     | Mob: +44 (0)7905 974 211
   [][] LShift Ltd             | Tel: +44 (0)20 7729 7060
 []  [] http://www.lshift.net/ | Email: tonyg at lshift.net