For those of you that are using Java RMI for your project 2 in CS4513 (the
rest of you can ignore this message!).

It was my expectation that if another user currently has an rmiregistry
process running that your client/server can simply use that registry with
your own name.  With the help of a student, we just confirmed that this
expectation is not always correct.

Thus:
1. It is a good idea to kill any rmiregistry processes you are running when
you are finished with them.

2. If someone else has started an rmiregistry process on the machine you
are using then I suggest you use an alternate port greater than 1024 and
less than 65536, which you just specify on the command line.  You will then
need to go and modify by your client and server code to use that specific
port number when running your code.  As an example I have modified the code
in /cs/cs4513/public/test/RMI/ so both the client and server expect the
registry to be running at port 4242 on the local machine.  Here's a script
showing that code work correctly on ccc4.

< ccc4 /cs/cs4513/public/test/RMI 5 >rmiregistry 4242 &
rmiregistry 4242 &
[1] 13865
< ccc4 /cs/cs4513/public/test/RMI 6 >java RMIExampleImpl&
java RMIExampleImpl&
[2] 13880
< ccc4 /cs/cs4513/public/test/RMI 7 >Server: Registering RMIExampleImpl as "cewTheRMIExample"
Server: Ready...
< ccc4 /cs/cs4513/public/test/RMI 7 >java -Djava.security.policy=java.policy RMIClient ccc4 -f 5
java -Djava.security.policy=java.policy RMIClient ccc4 -f 5
Client: Looking up rmi://ccc4:4242/cewTheRMIExample...
Server: Factorial() invoked...
Server: Factorial(5) = 120
Client: Factorial(5) = 120
< ccc4 /cs/cs4513/public/test/RMI 8 >jobs
jobs
[1]  + Running                       rmiregistry 4242
[2]  - Running                       java RMIExampleImpl
< ccc4 /cs/cs4513/public/test/RMI 9 >kill %1 %2
kill %1 %2
< ccc4 /cs/cs4513/public/test/RMI 10 >
[1]    Exit 143                      rmiregistry 4242

[2]    Exit 143                      java RMIExampleImpl

Probably the simplest approach is to pick your favorite random port number
and use this port number for the project.  If you take this approach then
be sure to be clear on what port number to use for rmiregistry when you
submit your project for grading.
				- Craig Wills