We need to extend the pstress to support PXB and also add better ways to reproduce the bug.
Extending pstress.sh is getting complicated given pstress is been used for all 3 products(PS, PXC, PXB). So rather than extending pstress.sh move to golang language.

It is very hard to reproduce the problem. I had tough time reproducing the PXB bugs.
There should be --replay Bug_directory option to reproduce the bug. We tried once but could not finish it. See this https://github.com/Percona-QA/pstress/pull/16 https://github.com/Percona-QA/pstress/pull/14