Users with a different username are able to login. In this example vtsha_admin is unable to login, nsroot can login..
This is because the user you are trying to login with has 20 active system sessions. You can verify the active sessions in the admin console via NetScaler > System Information > System Sessions or via a SSH sessions and the command
show system session -summary
The screenshots are to illustrate there are multiple sessions. The error is only seen with > 20 sessions.
The active sessions can be released in the admin console by selecting the session and clicking on Cancel Session or via a SSH session and the command
kill system session (SessionID)
You can prevent this situation by:
- Gracefully logging of you session (on the top-right there’s a Logout button)
- Prevent the session from expiring
- Frequently verifying orphaned sessions and cancelling / killing them
This is found on the Netscaler 10.0 software with build number 69.4.nc