POST requests lost between two vs intermittently
Since we upgraded our BIG-IP F5 from 188.8.131.52 to 184.108.40.206, we encountered a loss of POST requests between virtualserver and our backend. This is always the same request which is blocked.
Firstly, we were thinking that the problem was on the backend side because we were able to log HTTP_REQUEST_RELEASE event everytime. But we decide recently to roolback and the problem disappears.
In order to troubleshoot, we have mounted a temporary virtual server on which we redirect only the specific request.
And then, we were able able to observe that the HTTP_REQUEST_RELEASE occurs every time on the first virtualserver but on the temporary one, we only see CLIENT_ACCEPTED and CLIENTSSL_HELLO. Sometimes the request works and we can see HTTP events on this one.
Any help is appreciated !