When I change the IP address of a website, the URL monitor still pings the old IP.

When I change the IP address of a website, the URL monitor still pings the old IP.

Reason: 
    Upon successful DNS lookup, Applications Manager by default, caches the resolved IP forever. This IP might be used even if there is a change in IP address.

Solution:
    We should specify the amount of time a successful lookup should be cached. To do so, Please do the following : 
  1. Navigate to '<AppManagerHome>/working/jre/lib/security' and open the 'java.security' file present there.
  2. Search for the key 'networkaddress.cache.ttl'. By default, this key is commented. 
  3. Uncomment it and set the value to the number of seconds you wish to cache the successful lookup. A value of -1 indicates 'cache forever'.
  4. Restart Applications Manager and check if the issue is resolved. 

Still facing issues?
If the problem persists, contact our support team along with the following details:
  1. A screenshot of the "Add Monitor" page. 
  2. The URL debug tool response for the URL monitor.
  3. Reproduce the issue and share the latest Support Information File (SIF) from Applications Manager, with the "Print all logs" option enabled. To do this, go to Settings > Logging, and choose "Print all logs".