Operation aborted due to an unexpected error
On the destination VMware Cloud Director Availability (VCDA) site in /opt/vmware/h4/cloud/log/cloud.log
you have an entry similar the one below:
DATE TIME ERROR - [UI-########-####-####-########55-cF] [https-jsse-nio-8443-exec-4336] c.v.h.c.c.error.ExceptionAdvisorBase : A GET request from [email protected][##.##.##.##] to /inventory/vapps?sort=&offset=0&limit=50&site=cloud.example.com&orgId=-########-####-####-########977e failed.com.vmware.vcloud.client.exception.JAXBFault: javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"html"). Expected elements are <{http://www.vmware.com/vcloud/extension/v1.5}AclRule>,<{http://www.vmware.com/vcloud/v1.5}AclRuleRecord>,<{http://www.vmware.com/vcloud/v1.5}AclRuleReference>,<{http://www.vmware.com/vcloud/v1.5}AclRuleReferences>,[...]
VMware Cloud Director 10.6
VMware Cloud Director Availability 4.7.3
VCDA made the GET request and instead of receiving an XML response, the received response an HTML from the LB.
this usually happens when the HTTPS request header size and/or response header size and/or the response timeout are not correctly configured or if there is a low rate limit configured on the LB or any other misconfiguration.
Review and adjust the LB configuration according to the documentation VMware Cloud Director Cell Load Balancing Configuration.
Increase the LB rate limit.