Those patches apply to 2.2.x as well.
+1: rjung
+ * mod_proxy_ajp: The remote port information was forgotten from
+ the builtin data of the AJP 13 protocol. Since the servlet spec
+ allows to retrieve it via getRemotePort(), we provide the port to
+ the Tomcat connector as an additional request attribute.
+ Modern/future Tomcat versions know how to retrieve
+ the remote port from the attribute AJP_REMOTE_PORT.
+ For the AJP/Tomcat part see:
+ https://issues.apache.org/bugzilla/show_bug.cgi?id=41263
+ http://svn.eu.apache.org/viewvc?view=rev&revision=756926
+ http://svn.eu.apache.org/viewvc?view=rev&revision=757223
+ Patch in trunk:
+ http://svn.apache.org/viewvc?rev=761329&view=rev
+ +1: rjung
+
PATCHES/ISSUES THAT ARE STALLED