No data recorded on NetScaler MAS analytics.

Complete the following steps to troubleshoot this issue:

1. Verify if communication between NetScaler and MAS is open.

2. Verify if NetScaler is able to reach NetScaler MAS on UDP Port 4739.

3. If LogStream is being used, then NetScaler should be able to reach NetScaler MAS on TCP Port 5557.

4. Verify if accurate AppFlow policy is bound to virtual server.

5. Verify if the traffic is going through monitored virtual server.

6. Many times, AppFlow policy is bound to virtual server where there is no data traffic.

7. Verify policy hits. If there are multiple binding of same policy, then hits could correspond to a different feature.

8. Verify the current disk space, RAM and CPU utilization.

9. Disable ULFD mode and delete LogStream servers on NetScaler under System > Auditing > Logstream servers, if LogStream is not used to communicate with MAS.

Citrix Documentation - How to Enable Analytics on Instances

Citrix ADM version 12.1 build 49.37 and above has self-service diagnostics for Analytics which is used to identify the license and configuration issues on the managed instances which could lead to no data being captured. The self-service diagnostics helps you to identify and troubleshoot the issues faster. For more information refer to Citrix Documentation - Self-service diagnostics for Analytics.