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When using Apache 2.4.2 (and lower) in front of a DSpace webapp deployed in Tomcat, mod_proxy_ajp and possibly mod_proxy_http breaks the connection to the back end (Tomcat) prematurely leading to response mixups. This is reported as bug CVE-2012-3502 ( http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-3502 ) of Apache and fixed in Apache 2.4.3 (see  http://www.apache.org/dist/httpd/CHANGES_2.4). The 2.2.x branch hasn't shown this problem only the 2.4.x branch has.