vSphere HA detected that the application health state changed.
The application state could become unavailable or unstable.
vSphere App HA may run user-defined remediation actions to change application health back to normal. If no self-remidiation actions are defined, check VM health state for possible issues with compute, storage or network resources.
Check VMware online documentation for more information about configuring and using vSphere HA.
Check online vSphere App HA documentation.