ProxyPass /application http://localhost:8888/bapplication

<LocationMatch ^/application/login>
RequestHeader unset Authorization

# Put mod_auth_kerb's authentication result (r->user) to env variable
RewriteEngine on
RewriteCond %{REMOTE_USER} (.+)
RewriteRule ^.+$ - [E=REMOTE_USER:%1]

RequestHeader unset REMOTE-USER
RequestHeader set REMOTE-USER %{REMOTE_USER}e env=REMOTE_USER
</LocationMatch>