Tried to install EAServer 5.3 on VMWare, kept getting PB_INTERNAL_EXCEPTION when making component call. Our situation is very similar to this post on user group. Our problem also happens when DB operation occurred.
Same version running on physical box doesn’t get this issue.
Looks like a PBVM bug, switch from PBVM 102 EBF 16422 back to 16195, problem solved.