VMware Agent has entered an invalid state and is unable to proceed with normal operation (4285191)

Frequent VMW Agent Messages alarms for "The agent has entered an invalid state..." are triggered for a VMWare agent.

In the VMWare agent logs the following type of messages are present.

INFO [Quartz[0]-2568] com.quest.agent.esx.task.ESXAgentTask - Logging Agent Messages [Fatal-The agent has entered an invalid state and is unable to proceed with normal operation. This situation may be self-correcting. However, if you continue to see this message, please deactivate the agent and then reactivate it one or two minutes after deactivation completed. If the situation continues please contact Quest Support

ERROR [Quartz[0]-2570] com.quest.agent.esx.task.ESXAgentTask - Inventory and Relations - Error during execution: ERROR: java.rmi.RemoteException: VI SDK invoke Login, exception:DocumentException:null; nested exception is:
org.dom4j.DocumentException
java.lang.IllegalStateException: java.rmi.RemoteException: VI SDK invoke Login, exception:DocumentException:null; nested exception is:
org.dom4j.DocumentException
...
Caused by: java.rmi.RemoteException: VI SDK invoke Login, exception:DocumentException:null; nested exception is:
org.dom4j.DocumentException
...
Caused by: org.dom4j.DocumentException
...
Caused by: java.net.MalformedURLException

CAUSE 1

Possible network connectivity issue with vCenter.

CAUSE 2

Possible issues with domain authentication in the environment.

RESOLUTION 1

Please verify that there are no network connectivity issue from Agent Manager (FglAM) host to target vCenter on port 443 and agent account has required roles assigned.

RESOLUTION 2

To rule out issues related to the domain account in use, configure the agent to use a local vCenter account.