Design a Bounded Windows Watchdog for AV Software

A useful watchdog distinguishes a missing process from an unhealthy application, preserves evidence and limits restart attempts. Do not restart the entire exhibition whenever one endpoint fails to answer. Use only supported health signals and recovery methods, with a maintenance mode that prevents the watchdog from fighting an intentional shutdown or upgrade.

Define failure before choosing a restart action

Write a precise failure condition: process exited unexpectedly, a supported heartbeat is stale, or a documented local health request fails repeatedly. Avoid using one remote projector as the sole measure of controller health. Its network, power or protocol state may fail while the controller remains healthy.

Microsoft's service failure actions reference describes recovery for genuine Windows services. Its service state documentation explains reported service states. Neither mechanism automatically diagnoses a frozen desktop interface or certifies the connected AV system.

Design for evidence and backoff

Record the trigger, timestamp, process identity, recent health observations and recovery attempt number before acting. Allow the supported startup interval so a slow boot is not misclassified as a new failure. Increase the interval between repeated attempts and stop after the agreed limit, leaving a clear maintenance indication.

A sample policy might allow one restart after a confirmed process exit, wait for the measured startup period, and escalate if the application cannot load its configuration. Those are illustrative design choices, not universal timing values. Choose limits from the actual installation's boot time and operational impact.

Avoid duplicate or destructive recovery

• Confirm the primary startup mechanism and process ownership.

• Check that no other supervisor already manages the application.

• Use the vendor's supported graceful stop before forced termination where possible.

• Preserve the relevant log interval and configuration identity.

• Restart under the same intended account and working directory.

• Mark success only after the supported readiness check passes.

Do not let a supervisor replay a full opening sequence automatically unless that action is explicitly designed and tested to be repeatable. A restart should not silently issue power toggles or duplicate presentation cues. If the application cannot distinguish recovery from a fresh show start, document that limitation and use operator intervention.

Test failure injection away from live operation

On a bench or approved maintenance system, close the application unexpectedly, delay the network, provide an invalid test configuration and disable the watchdog's health dependency one at a time. Verify that the restart limit and maintenance suppression work. Do not deliberately corrupt the only production configuration to test resilience.

Use the documented Windows event export tool to retain relevant system evidence when appropriate. Keep application logs as well, since Windows may not know why a device transaction failed.

Accept the design when it recovers the defined recoverable failures, avoids loops and produces enough evidence for a maintainer to investigate the rest. Record the tested health contract and update it after application changes.

Add the result to the AV commissioning checklist. This is a general deployment pattern; verify the installed controller's supported health and startup features before promising watchdog functionality in a partner proposal.