libapache2-mod-jk - 1:1.2.49-1 main

Apache Tomcat is the reference implementation for the Java Servlet and
JavaServer Pages (JSP) specification from the Apache Jakarta project.
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This package contains an Apache 2 module (mod_jk) to forward requests
from Apache to Tomcat using the AJP 1.3 or 1.4 protocol. It can either
talk to Tomcat on the local machine or to a remote engine using TCP.