Hey Binhvq.
Our problem turned out to be a mismatch in firmware/driver metric from the behind laying IBM SVC's and and our 650FLB Firmware.
So what type of Storage SVC/Switches do you use?
Btw - please read here : https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2148123
Regarding the "tried to re-accquired lock vport_lock" issue.
