> I did google this error message, "...signal 10: Bus error.." and > found the issue with hardware problem, memory. > > Do you have any other pointers or clues that I can look into?
Well, the very first thing I would do is to make sure that the OS and jail software was up-to-date, in case it is a bug which has been fixed. I might take a look at BIOS and firmware levels, too. Tomas makes a good point about the XML library tending to be problematic, so I would make sure that was current.
If I still had the problem after that, I would try to distil it down to the smallest reproducible test case, and see whether it ran OK outside the jail.
Another approach would be to run hardware tests, although that tends to require a longer maintenance window than the other things.
Basically, there are a lot of layers the problem could be in, and not a lot of reason to suspect any particular layer, so you need to start ruling things out. In a situation like that I tend to start with the fastest, easiest layers to check first.
