[tao-users] After an upgrade of ACE/TAO from 2.2.2 to 2.3.3, the behaviour of the portspan parameter of -ORBListenEndpoints seems to have changed.

[Johnny Willemsen]

Hi,

Thanks for using the PRF form. This sounds like a bug, at the moment you
use portspan the behavior should be as you described with 2.2.2.

Could you create an automated unit test (by taking one of the existing
ones under TAO/tests) that reproduces this? See
https://github.com/DOCGroup/ACE_TAO for the current git repository where
you can open a pull request with the new test.

Best regards,

Johnny Willemsen
Remedy IT
Postbus 81 | 6930 AB Westervoort | The Netherlands
http://www.remedy.nl

On 05/18/2016 03:37 PM, Maarten Van Hout wrote:
> TAO VERSION: 2.3.3
> 
> ACE VERSION: 6.3.3
> 
>  
> 
> HOST MACHINE and OPERATING SYSTEM:
> 
>     Windows 7, Winsock2
> 
>  
> 
> COMPILER NAME AND VERSION (AND PATCHLEVEL):
> 
>     Visual Studio 2015 Express Edition 19.00.23918 for x86
> 
>  
> 
> THE $ACE_ROOT/ace/config.h FILE [if you use a link to a platform-
> 
> specific file, simply state which one]:
> 
>     ace/config-win32.h
> 
>    
> 
> CONTENTS OF $ACE_ROOT/bin/MakeProjectCreator/config/default.features
> 
> (used by MPC when you generate your own makefiles):
> 
>     -
> 
>  
> 
> AREA/CLASS/EXAMPLE AFFECTED:
> 
>     -
> 
>  
> 
> DOES THE PROBLEM AFFECT:
> 
>     COMPILATION? No
> 
>     LINKING? No
> 
>     EXECUTION? Yes
> 
>     The problem affects all our server applications.
> 
>  
> 
> SYNOPSIS:
> 
>     After an upgrade of ACE/TAO from 2.2.2 to 2.3.3, the behaviour
> 
>     of the portspan parameter of -ORBListenEndpoints seems to have
> 
>     changed.
> 
>    
> 
> DESCRIPTION:
> 
>     The following options are used to start our servers:
> 
>     -ORBListenEndpoints iiop://192.168.205.48:2001/portspan=31
> 
>     -ORBInitRef NameService=corbaloc:iiop:GET12022:1570/NameService
> 
>    
> 
>     With the first option, we use portspan=31 so our servers listen on
> 
>     the first free port, starting at 2001 till 2031.
> 
>     This has always worked, but ever since the upgrade, it didn't.
> 
>    
> 
>     What we saw when using TAO 2.3.3 was the following. After startup,
> 
>     all our servers where listening on port 2001, but only the first server
> 
>     to start was able to establish a connection with the naming service.
> 
>    
> 
>     With TAO 2.2.2 the behaviour was different. The first server started
> 
>     would use port 2001, the second 2002, and so on. What we expected our
> 
>     servers to continue doing after the upgrade to 2.3.3.
> 
>    
> 
>     We managed to get the needed behaviour by changing the first option to
> 
>     -ORBListenEndpoints iiop://192.168.205.48:2001/portspan=31&reuse_addr=0
> 
>    
> 
>     Is this the way to go now? Why did this behaviour change? Was it a
> bug that
> 
>     has been fixed? Or is it a bug now?
> 
>  
> 
> REPEAT BY:
> 
>     Please adjust the ip address in the following program. When executing
> 
>     this application twice, you should see the 2 applications listen
> 
>     on the same port (2001).
> 
>  
> 
>     #include "tao/TAO_Internal.h"
> 
>     #include "tao/PortableServer/PortableServer.h"
> 
>    
> 
>     int main()
> 
>     {
> 
>         CORBA::ORB_var orb = CORBA::ORB::_nil();
> 
>         PortableServer::POA_var poa = PortableServer::POA::_nil();
> 
>         PortableServer::POAManager_var poa_manager
> 
>             = PortableServer::POAManager::_nil();
> 
>        
> 
>         if(! CORBA::is_nil(orb)) return 1;
> 
>         char* oargv[] = {
> 
>         "dummy",
> 
>             "-ORBListenEndpoints",
> 
>             const_cast<char*>(
> 
>                 "iiop://192.168.205.48:2001/portspan=31"),
> 
>             0
> 
>         };
> 
>         int oargc = (sizeof(oargv)/sizeof(char*)) - 1;
> 
>         orb = CORBA::ORB_init(oargc,oargv,"TAO_orb");
> 
>  
> 
>         CORBA::Object_var poa_object
> 
>             = orb->resolve_initial_references("RootPOA");
> 
>         poa = PortableServer::POA::_narrow(poa_object);
> 
>         poa_manager = poa->the_POAManager();
> 
>         poa_manager->activate();
> 
>        
> 
>         while(1);
> 
>        
> 
>         return 0;
> 
>     }
> 
>  
> 
> SAMPLE FIX/WORKAROUND:
> 
>     Changing the first option to
> 
>     -ORBListenEndpoints iiop://192.168.205.48:2001/portspan=31&reuse_addr=0
> 
>     did the trick.
> 
> 
> 
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