Process status is different between tsm status -v, TSM, and Web UI Server Status View

Issue

Tableau Server is running but the following is true:

Running tsm status -v shows a status of the node(s) as ERROR, and all individual Tableau Server Services show "<process> status is unavailable"
Tableau Server Manager Status Tab shows all processes on this node in an Error state
The Server Status page in Tableau server shows all statuses as "Active"

Environment

Tableau Server 2018.2 and newer.
Windows Server

Resolution

Option 1 - Start the Tableau Server Administration Agent Service using the Services Console or from command line as System Administrator using "sc start tabadminagent_0"
After restarting the service, confirm all three methods show matching results.

For a description of agent, what it does, how to start and stop it, please see help guide on the Tableau Server Administrative Agent at https://help.tableau.com/current/server/en-us/server_process_admin-agent.htm

If the Tableau Server Administration Agent Service does not start or frequently stops,

Look in the log located where the help guide indicates. (C:\ProgramData\Tableau\Tableau Server\data\tabsvc\logs\tabadminagent.) It should show any error messages, or any other indications of why the service may be stopping or not be starting.
These two help guides might help to troubleshoot
- Verify Tableau Service Settings: https://help.tableau.com/current/server/en-us/runas_svc.htm
- The installation guides: https://help.tableau.com/v2019.4/server-linux/en-us/install_config_top.htm

Option 2 - If there is a proxy enabled for Tableau Server, make sure to Tableau Server has completed Configuring Proxies for Tableau Server

Cause

The Tableau Server Administrative Agent Service is down, or not starting. (Service name tabadminagent_0).

Additional Information

The issue is due to a difference in the way the status reporting tools contact the various processes. TSM (CLI and Web GUI) status inquiries connect to the the Tableau Server Administrative Agent Service (Service name tabadminagent_0) service, and Tableau Server Administrative Agent Service then checks to see if the services are up and responds to the request. If Tableau Server Administrative Agent Service is down, then the status of all of the processes on that machine will be unavailable to report until Tableau Server Administrative Agent Service is started again.

The Tableau Server Server Status (Process Status) page use a different method to determine process status. It attempts a direct connection with each service, and if the service responds, a green checkmark is displayed.

So in this case, where Tableau Server Administrative Agent Service is down, it makes sense that tsm status -v is showing an unavailable error, but the Tableau Server's Server Status page is reporting the individual services as up. When Tableau Server Administrative Agent Service is down, observe tsm status -v shows services as "<process> status is unavailable", not "Stopped" or "Error". The TSM Web UI will show processes in an error state.

Tableau Server Administration Agent