OSSL-161 — The process cannot access a cached SSL/TLS session
Starting a new SSL/TLS session is a relatively costly operation.
Therefore it is possible to share a session for several connections.
Active sessions are stored in session cache shared by all processes of the proxy. The cache is stored partially in a shared memory and in files. Each session occupies a separate file. If the file cannot be loaded, the session cannot be resumed and a new session must be initiated.