[omniORB] Synchronization between omniNames service & Services

[R. P. Janaka]

Hi all,

I am writing a simple Fault tolerant server which can handle client request
without any service interruption..Using C++ & omniORB

In my system there are two servers as Master & Slave..

When they starts they get registered with the name service as usual.
Normally the first one will be the Master and the next one is the slave.

All are working properly..But still have a simple problem which I was unable
to solve. It is as follows.


   - When both Master & Slave are running....
   - Manually kill the Slave
   - Start the Slave again.

In some situation this Slave restart does not work properly.. it gives an
exception. This exception is my own exception and It says that Slave already
exist.
This happens only randomly, but occurring frequency is pretty high. (at
least 30% of the time it will happen)

If I retry several times I could get success. Because If I call start method
within the catch block I can really reduce the occurring frequency of this
exception.


So I guess the problem is with the name service. Because when I just kill
the Slave, the name service does not know anything about this killing. So it
is still keep registering details of the Slave. Because of that it gives and
exception when I am going to register the Slave again.

Please can anyone guess any other reason for this problem.....?

If my guess is correct...Please can anyone help me to solve this problem..
Is there a continues synchronization between the name service and the
service itself .....?


-- 
Regards,
R. P. Janaka
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