[omniORB] Multiple servers pinning the same port?

[Bruce Visscher]

Bruce,

> I have noticed that omniORB seems quite happy to
> seize control of a port that is already being used
> by another server. For instance, you can run two
> naming services on the same port.

Really?  When I try that on OpenVMS, here's what happens:

SYS16[.DPC.BCV.CFG]> omninames
BOA_init falied: cannot use port 27500 to accept incoming IIOP calls.
%CXXL-F-TERMINATE, terminate() or unexpected() called
%TRACE-F-TRACEBACK, symbolic stack dump follows
  image    module    routine             line      rel PC           abs PC
 OMNINAMES                                  0 000000000003054C 000000000004054C
 OMNINAMES                                  0 00000000000325B0 00000000000425B0
----- above condition handler called with exception 05F7841C:
%CXXL-F-RETHROW, Exception rethrown at PC = 0010F8C0
----- end of exception message
                                            0 FFFFFFFF8008BC3C FFFFFFFF8008BC3C
 OMNIORB2_RT                                0 00000000000C0B64 0000000000132B64
 OMNIORB2_RT                                0 00000000000C1144 0000000000133144
 OMNIORB2_RT  CORBABOA  BOA_init        27765 0000000000001460 000000000010F8C0
 OMNINAMES  OMNINAMES  main             29227 00000000000008B0 00000000000308B0
 OMNINAMES  OMNINAMES  __MAIN               0 0000000000000070 0000000000030070
 OMNINAMES                                  0 0000000000034FF0 0000000000044FF0
 PTHREAD$RTL                                0 00000000000312FC 000000007BB492FC
 PTHREAD$RTL                                0 0000000000012B48 000000007BB2AB48
                                            0 FFFFFFFFA91613F4 FFFFFFFFA91613F4
%CXXL-F-TERMINATE, terminate() or unexpected() called
%TRACE-F-TRACEBACK, symbolic stack dump follows
  image    module    routine             line      rel PC           abs PC
 OMNIORB2_RT                                0 00000000000C14AC 00000000001334AC
 OMNIORB2_RT                                0 00000000000C3510 0000000000135510
----- above condition handler called with exception 05F78414:
%CXXL-F-EXCEPTION, Exception thrown at PC = 001A6298
----- end of exception message
                                            0 FFFFFFFF8008BC3C FFFFFFFF8008BC3C
 OMNITHREAD_RT                              0 00000000000324D4 00000000001A84D4
 OMNITHREAD_RT                              0 0000000000032654 00000000001A8654
 OMNITHREAD_RT  POSIX  ~omni_mutex       9466 0000000000000298 00000000001A6298
 OMNIORB2_RT  CORBABOA  __fini_CORBABOA_CC_1_83a85060_00000000
                                        27611 0000000000000868 000000000010ECC8
                                            0 FFFFFFFF8095D16C FFFFFFFF8095D16C
                                            0 FFFFFFFF8006EE04 FFFFFFFF8006EE04
 PTHREAD$RTL                                0 000000000004636C 000000007BB5E36C
 PTHREAD$RTL                                0 00000000000312FC 000000007BB492FC
 PTHREAD$RTL                                0 0000000000021504 000000007BB39504
                                            0 0000000000000000 0000000000000000
 PTHREAD$RTL                                                 ?                ?
                                            0 FFFFFFFFA91613F4 FFFFFFFFA91613F4

Not very pretty, but effective!

I always assumed it was the OS's responsibility to prevent problems like what
you describe.  What platform are you doing this on?

Bruce
-- 

Bruce Visscher                                        visschb@rjrt.com
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