We have OpenAM plugin for Apache Http server. Here Apache Http server works as reverse-proxy. OpenAM plugin validates user requests for authentication and authorisation then forwards the requests to service. This works fine for some days. But suddenly, OpenAM plugin fails to authenticate and authorise and requests directly goes to service. Only fix is to restart the Apache HTTP server.
But this is not the correct fix. We would like to find the real route cause of this problem and fix. There is no logging reported from http server.