>After upgrading Citrix ADC to version 14.1-8.50 from version 13.1, users are facing management GUI access issue with Tacacs authentication. Almost all pages are opening very slowly and are giving error Operation timeout.

>Disabling RbaOnResponse resolves the issue as a workaround

 

1. Please follow the below steps to apply the solution after login to the ADC.

2. To check the current value run below command

3. Add the same command in the file /nsconfig/rc.netscaler to persist the reboots.

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Problem Cause

When RbaOnResponse is enabled, each command execution triggers an nsaaad process for authorization. In the latest version there is a limitation introduced with the  maximum concurrent nsaaad processes to 512 to manage CPU usage. However, during quick page switching in the GUI, the command execution count surpasses this limit, leading to dropped authorizations and causing the 'operation timeout' issue.