[IPython-user] engine registration failure on MacOSX

[Lev Givon]

Received from Lev Givon on Thu, Nov 06, 2008 at 12:07:35PM EST:
> When I recently tried to run an ipython 0.9.1 controller and engine on
> a MacOSX 10.5.5 system, I observed that the engine fails to register
> with the controller when I attempt to run ipengine (the below assumes
> the controller was already started):
> 
> 2008-11-06 12:05:39-0500 [-] Log opened.
> 2008-11-06 12:05:40-0500 [-] Using furl file: /Users/lev/.ipython/security/ipcontroller-engine.furl
> 2008-11-06 12:06:10-0500 [-] 'engine registration failed:'
> 2008-11-06 12:06:10-0500 [-] Unhandled Error
>         Traceback (most recent call last):
>         Failure: twisted.internet.error.TimeoutError: User timeout
>         caused connection failure.
> 
> 2008-11-06 12:06:10-0500 [-] Main loop terminated.
> 
> This occurs regardless of whether I attempt to start the cluster with
> ipcluster or whether I start an ipcontroller manually and then try to
> start an ipengine instance (I made sure to clear out the contents of
> ~/.ipython/security before starting the processes). Why would this be
> occurring? Could it have to do with my firewall settings? If so, would
> I need to allow incoming connections from the host itself?
> 
> I'm running python 2.5.2, twisted 8.1.0, foolscap 0.3.2, pyopenssl
> 0.7, and zopeinterface 3.4.1 (all installed through Fink).
> 
>      	 	       	     	  	    	    L.G.

Found the answer: my firewall was blocking IP connections from
127.0.0.1.

							L.G.