The Player Project

Brian,

Thanks for the hint on using the -p PORT on the stage command. That does 
fix part of our problems. Now, multiple users can use Stage on the same 
machine. But, a single user can't run multiple versions. It seems that 
the /tmp/stageIO.user.0 directory prevents a single user from starting 
stage again. Here is the error I get:

[dblank@... pyro]$ stage -p 1701 
/usr/local/stage/worlds/stage1.world &
[5] 6292
** Stage  v1.3.1 ** [Port 1701][World /usr/local/stage/worlds/stage1.world]
** Player v1.3.1 ** [Stage /tmp/stageIO.dblank.0]
 

[dblank@... pyro]$ stage -p 1802 
/usr/local/stage/worlds/stage2.world &
[6] 6294
** Stage  v1.3.1 ** [Port 1802][World /usr/local/stage/worlds/stage2.world]

stage warning : server.cc CreateDeviceDirectory Device directory exists. 
Possible error?
 
          ** Player v1.3.1 ** [Stage /tmp/stageIO.dblank.0]
create_and_bind_socket():bind() failed; socket not created.: Address 
already in use create_and_bind_socket() failed; quitting

Is there a solution for this?

Thanks in advance for any hints!

-Doug

 > hi Doug,
 >
 > I think that the Stage flag you're looking for is '-p <port>'.  See, 
Stage
 > is also listening on a particular port, and unless you tell it 
different, it
 > will always listen on 6601 (hence your binding errors).  So, each 
user should
 > pick a different port and pass it to Stage on the command line.
 >
 > Btw, this will all get much easier relatively soon.  I've recently 
implemented
 > a name-server functionality and the ability for Player to auto-assign 
ports.
 > That way, you can pretty much ignore such port management issues.
 >
 >         brian.


> Message: 1
> Date: Fri, 02 May 2003 11:36:37 -0400
> From: "Douglas S. Blank" <dblank@...>
> To: playerstage-users@...
> Subject: [Playerstage-users] Multiple Stages on single machine
> 
> Player/Stage users:
> 
> I need some help in order to have students complete their projects soon. 
> A couple of questions:
> 
> 1. It appears that a user can only have one version of Stage running at 
> a time; is that correct? If so, I assume it is because of the 
> /tmp/userIO files. Or maybe we are not running Stage correctly? We start 
> stage up like:
> 
> stage worldfile
> 
> (with stage and player in the path) and connect onto it with our own 
> Python-based player. Should we use the -n flag, or something else?
> 
> 2. Multiple users don't seem to be able to run their own versions of 
> Stage without getting binding errors. Surely we must be doing something 
> wrong here. Each user starts their own version of Stage as per above 
> with their own worldfile and different ports, but when stage starts, it 
> gives "unable to bind" errors.
> 
> If you have any hints or suggestions please help. Thanks!
> 
> -Doug
>