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Technology Tomcat

Configuring Zenss to monitor Tomcat 6 through a firewall

One of the difficulties in monitoring a java process using JMX/RMI is the random secondary port opened for the JMX RMI connection objects. This random port can change every time the process is started, and there is no way to configure a firewall to allow this dynamic port to pass through. Fortunately there are some […]

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Java Tomcat

javax.el.ELException: Function ‘:empty’ not found

After installing Continuum 1.1 and Archiva 1.1.1 a number of web pages failed to load throwing exceptions such as javax.el.ELException: Function ‘:empty’ not found. As it turns out, this has to do with Tomcat version 6.0.18 and the EL library that it comes with. As always, when on Linux, a script can fix things and […]

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Java Plesk Technology Tomcat

Tomcat Upgrade on Plesk for Linux/Unix

This article describes how to upgrade Tomcat running under Plesk and how to disconnect the control Plesk has over the Tomcat server. This may not be the ideal configuration for you if you have many clients using JSP webapps. Your clients will no longer have the ability to use the Plesk war upload feature from […]

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Java Plesk Technology Tomcat

Tomcat webapps and a Plesk vhost.conf file

Plesk loves to overwrite all manual changes to the httpd.include file for your vhost. In fact, this is the normal behavior of Plesk, and you must place all changes in a separate file, vhost.conf (notice the warning inside of httpd.include) # ATTENTION! # DO NOT MODIFY THIS FILE OR ANY PART OF IT. THIS CAN […]