Thanks for your reply.
update the proxy_ignore_headers with Vary fixed the issue
Posted at Nginx Forum:
https://forum.nginx.org/read.php?2,277358,277378#msg-277378
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I am running nginx server in front of httpd server.
nginx -V
nginx version: nginx/1.10.2
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-17) (GCC)
built with OpenSSL 1.0.1e-fips 11 Feb 2013
TLS SNI support enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx
--modules-path
