Someone is currently logged into the APC Management Web Server Please try again

If you get a page saying ‘Someone is currently logged into the APC Management Web Server. Please try again later.’ when trying to connect to a managed APC PDU via the web interface there are a couple of likely causes.

1. Someone is connected via the serial port – this will always override any IP connection.
2. The web interface is ‘stuck’.

If it’s number 1 then you’ll need to find the machine physically connected and disconnect the terminal session, but the fix for number 2 is quite simple.
Just telnet to the device, then log off. This will reset the APC Management Web Server and you’ll be able to log in.

telnet 100.100.10.10

Connecting to 100.100.10.10:23...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

User Name : username
Password  : ************

Switched Rack PDU: Communication Established

------- Control Console -------------------------------------------------------

     1- Device Manager
     2- Network
     3- System
     4- Logout

     <ESC>- Main Menu, <ENTER>- Refresh, <CTRL-L>- Event Log

Type 4 and Hit enter key
> 4
Connection Closed - Bye

Connection closed by foreign host.

Disconnected from remote host(100.100.10.10) at 17:26:07.

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