This is an Issue caused by the vpxa.cfg file. you could try following and should work for us
1. Remove and re-add the Host to the Vcenter Server.
and If still problems
SSH onto the host in question and rename/delete the /etc/vmware/vpxa/vpxa.cfg
~ # cd /etc/vmware/vpxa
/etc/vmware/vpxa # ls
dasConfig.xml vpxa.cfg
/etc/vmware/vpxa # mv vpxa.cfg vpxa.cfg.old