How to serve stale content in case no render is available

In order to enable this feature, an additional flag /serveStaleOnError has to be set below the/cache section:

dispatcher.any

/cache     # Flag indicating whether the dispatcher should serve stale content if   # no remote server is available.   /serveStaleOnError "1"

Please note that only the following response codes are considered:

• 502 - Bad Gateway
• 503 - Service Unavailable
• 504 - Gateway Timeout