During the Access Appliance upgrade, I/O gets paused with an error message

When you upgrade the appliance, if the nmdb service stops running on a node, the I/O goes into PAUSED state and the following error message is displayed:

Invalid username or password

On all the other node, the shares are accessible.

(IA-14892)

Workaround:

Run the cifs> server status command. If the server is in online state and still I/O is paused, then restart the CIFS server from the Access Appliance command-line interface.

cifs> server stop

cifs> server start

The required configurations get updated and I/O processes are resumed.