Error on log file : xpxd-xxxx.log
Update for property timestamp failed
Check the time zone, time and date on the Vcenter server machine and the DB server.
The Vcenter tries to checkout and insert the timestamp in a register on database, if the time and date are different, the error message is display on the log file, and the insert fail.
I resolve this issue, implementing an NTP Server, and synchronizing with this all servers of the infraestructure ( VCenter + DB + ESX ).