I followed you steps and still find no issue, and my details steps are listed here
1) change hostname from myvcva to myvcva.eng.vmware.com on web interface https://<ip>:5480
2) reboot through web interface system->reboot
3) VCVA could start successfully
4) Change hostname from myvcva.eng.vwmare.com to hosta.eng.vmware.com through web interface
5) Stop/start VCVA server on web interface vCenter Server-> Stop vCenter and vCenter Server->Start vCenter
6) All ok.
So would you check with me any difference between your steps?
And if you could reproduce this issue, could you help to collect and attach vc support bundle through tool /usr/lib/vmware-vpx/vc-support.sh?
Thanks
Yike (ykzhang@vmware.com)