Looking at some vCenter logs and have entries such as:
09:06:51.882 'App' 5236 info] [VpxLRO] -- BEGIN task-internal-48
What is VpxLRO?
Looks like it is a function associated with the running of vpx tasks. Mostly, you would see it when a task is starting or completing.
VPX = vCenter
LRO = Long Running Operation
VpxLRO is the basic class for implementing a command in vCenter, taking care of some lower level operations.