Resin Professional includes a powerful and configurable system for monitoring application server health. The system is intentionally similar to the Resin's "URL Rewrite" rules, based on a configurable set of checks, conditions, and actions. The health checking system runs internal to Resin on a periodic basis. Checks are generally always performed on the local Resin node, and if actions are to be taken, they are performed against the local Resin node as well.

Health meters are a simple way to create visually pleasing graphs in /resin-admin.

Resin Professional includes a PDF report of your system's health.

For reliability and security, Resin servers are started and monitored by a separate Resin watchdog process. The watchdog continually checks the health of the Resin server and restarts the Resin instance if is becomes unresponsive.

In most cases, the watchdog reads the resin.xml and configures itself automatically, so no extra configuration is required. Certain specialized configurations like ISPs can configure the watchdog to isolate JVMs for protection and security.