Cisco ISE Monitoring API - How to get complete information from ALL active Mac Addresses?

[ShuningWu14393]

We want to get information from all active Mac Addresses, and below is what we did:

1. First, we used this request on Monitoring API to get the session active list: https://<ISEhost>/admin/API/mnt/Session/ActiveList  
2. The active list gave us about 10,000 Mac Addresses, then we used another request to get detailed information for each active Mac Address: https://<ISEhost>/admin/API/mnt/Session/MACAddress/<macaddress>
3. However, from Step 2, we only got non-empty responses from the first ~5000 Mac Addresses

So our questions are:

• Does the Monitoring API have any time-out setting (e.g., the server will terminate the API connection after a certain time)?
• Does the Monitoring API have any rate limit (e.g., the server will terminate the API connection if too many requests have been submitted)? 
• Any other possible reasons that we were not able to get complete information for all 10K Mac addresses?

Thanks!