2.4.9 The Error Handling Section
If adding a member to the pool fails, the remedy is to undo the changes:

If the vApp was deployed (powered on), undeploy it.

If the vApp was instantiated, delete the vApp
, and raise an exception.
If a virtual machine
was added to an existing vApp, undeploy
it, delete the virtual machine,
and raise an exception.
2.4.9.1. Logs
Error : "Failed to add members to the load balancer" and the error coming from the add members to plug-in workflow or the underlying F5 iControl plug-in.
Information : "Undeployed vApp [vApp name]
Information : "Deleting VM [virtual machine name] "
Information : "Undeployed vApp [vApp name] and deleting it !"
Figure 7. Workflow Schema: Error Handling