Recently we upgraded from MX to CF 8, and code that worked on MX now generates a blank white screen on CF 8. The code is memory intensive and pulls large resultsets from the db and loops over them to send elerts to approx. 40k clients. By adding exittemplate calls I can short-circuit the code and so I can see that certain loops are causing the problem, but I am not sure what the solution is or why I only get a white screen and no errors on screen or in the log. I can see jrun memory usage is spiking when the task runs but I do not get out of memory errors and the other sites are still responsive. I have tried tweaking the jvm memory settings but have been unable to resolve the issue or make any headway. (eg,changing heap size from 512mb to 768 mb to 1024 mb, adding explicit calls to garbage collect in the code, etc.).
Can anyone clarify under what circumstances CF will generate a blank white page with no source code, and what solutions may exist for performing memory intensive operations.
Thanks,
Theo