MULTI_TREADING with OCI

Question

Hi everyone,
We do the following in an OCI program :
1. The environment is properly initialized with OCI_THREADED (and without OCI_ENV_NO_MUTEX).
2. Two threads A and B are involved.
3. Thread A creates and properly sets up a service context handle and a session handle.
4. Both threads A and B use the same service context and session handles (though never concurrently). This works fine.
5. At one point, thread A ends. Thread B continues to execute.
6. After A ends, thread B gets an OCI_INVALID_HANDLE when it attempts to use the service context and session handles.
7. Note that thread B would have closed the handles before ending, but does not have the chance to get that far.
Is that normal? Is it forbidden to share service context and user session handles amongst threads? The documentation strongly suggests otherwise.
We are using Oracle client 11G Release 1 and the server is also at the same version.
Best regards.
Carl

Answer 1

Do I have this right?
You want to start a Java application from the commandline, and this application creates multiple threads.
Each thread executes methods from the ProcessBuilder or Runtime classes, which opens a terminal (cmd) window, starts an external (non-Java) .exe program. The exe writes to the cmd window.
If that's correct, then you need to learn how to create a threaded program, and to use Either the ProcessBuilder or Runtime class.
Here's a how-to on creating threaded (concurrent) Java programs
http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html
and here's an article on correct use of the Runtime class
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html