A development team responsible for the front-end shopping application has asked to receive an email...

In AppDynamics, you can create health rules to monitor various metrics and set up actions based on the thresholds defined for these metrics. For monitoring Java container thread counts, you can set a health rule based on Node Health - specifically on thread pools - to trigger when the thread count exceeds a specific value. The Notification Action can then be configured to send an email to the development team whenever this threshold is breached.

References:

AppDynamics documentation on Health Rules: https://docs.appdynamics.com/21.6/en/infrastructure-visibility/health-rules