FWIW, it segfaults on a jsp request... I suppose that this is handled by a third party module such as mod_jk? See the final snippet:
I was reminded by a little bird that you had mentioned in your original message that you were using the WebLogic plug-in. Maybe some hints here will help you get a core dump, but regardless: If you're using a commercially supported product and that product was likely doing something around the time of the crash (which seems likely), make sure you report it to them. They can at least make sure you have their latest and greatest code, and if you're lucky even verify that there was some known issue that could explain the crashes. Another general debug technique that applies here: If you can verify that a crash only occurs for requests handled by that plug-in, that is more information they can use as well.
