SSL_SESSION_ID does not appear HTTP header in first access
Issue
We're trying to use the mod_ssl environment variable %{SSL_SESSION_ID}s and put it in the response headers. So we put the following line into our httpd configuration file:-
Header set SSL_SESSION_ID "%{SSL_SESSION_ID}s"
Also, according to 1, we configured SSL session cache DB. However, I still can't consistently get the session ID in the headers. Empirically, it appears that SSL_SESSION_ID in the headers is null on the first access within the SSL session and it's only being put into the headers on the second call.
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