Program Crashes while multi-threading

Question

Hi Gurus:
I am working on a program where I am running multiple JInternalFrames inside a JFrame. Each JInternalFrame starts a new thread (when the OK button is pressed). The thread calls a native (C++) method, which interfaces with another API (CAD).
Problem is that when I run two frames together, my program crashes. If I wait for one frame to complete the process and then start the second one, everything works fine. I am not sharing any data between the threads. I even put a synchronized access modifier in front of the method that is causing the crash, to no avail. Don't know what else to try. I also ran the program in two different processes with only invoking one frame in each process, and it worked fine.
The program either crashes with no error message, or sometimes it gives this error:
-------------- Start of error --------------------------
Another exception has been detected while we were handling last error.
Dumping information about last error:
ERROR REPORT FILE = (N/A)
PC = 0x22ABDFFD
SIGNAL = -1073741819
FUNCTION NAME = (N/A)
LIBRARY NAME = (N/A)
Please check ERROR REPORT FILE for further information, if there is any.
Good bye.
----------- End of error -------------------------------
Any help would be appreciated.
Regards,
Kamran

Answer 1

I also got that error - sometimes.
Now I get something like this :
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0x403bce8e
Function name=__libc_free
Library=/lib/libc.so.6
Dynamic libraries:
08048000-0804c000 r-xp 00000000 08:01 17180 /usr/java/jdk1.3.1_01/bin/i386/native_threads/java
0804c000-0804d000 rw-p 00003000 08:01 17180 /usr/java/jdk1.3.1_01/bin/i386/native_threads/java
40000000-40016000 r-xp 00000000 08:01 446282 /lib/ld-2.2.2.so
40016000-40017000 rw-p 00015000 08:01 446282 /lib/ld-2.2.2.so
and so on.
I got an application which starts 50 threads (sometimes I start 60 or 30, just testing right now).
Do you've got RedHat? And Kernel 2.4.2-2smp?
I don't know how I got rid of your error, but now I got that one...
Anybody who has experiences with that?
THX,
Peter