xxxx-xx-xxTxx:xx:xx.xxx+xx:xx warning vpxd[60588] [Originator@6876 sub=vmomi.soapStub[180] opID=TaskLoop-host-xxxx] SOAP request returned HTTP failure; <SSL(<io_obj p:0x00007f5fbc8df7b8, h:78, <TCP 'xx.xx.xx.xx : xxxxx'>, <TCP 'xx.xx.xx.xx : xxx'>>), /vpxa>, method: waitForUpdates; code: 500(Internal Server Error)vCenter Server 7.x
Issue is caused by missing SSO Group Memberships for the vSphere Solution Users
Issue is fixed in vCenter 7.0.3i and later.
Note: If you not able to upgrade the vCenter open a case with support to provide a workaround.