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    <p>You can set the system default class loader as a JVM argument:</p> <pre><code>java -Djava.system.class.loader =com.test.YourCustomClassLoader com.test.YourMainClass </code></pre> <p>As Tomcat starts as a java application, you can set this parameter too, at the <code>%TOMCAT_HOME%\bin\run.bat</code> or <code>$TOMCAT_HOME/bin/run.sh</code> executable.</p> <p><strong>Edit for completion:</strong> If you set your classloader as de System class loader, it will be used to load Tomcat component classes, the different libraries, and your own classes. If you want your class loader to be used only for your application classes (including libraries and so), you should configure a <code>Loader</code> element for your context. The Loader element must be defined inside your <code>Context</code> element, wich can be defined at a <code>context.xml</code> file. More information: </p> <ul> <li><a href="http://tomcat.apache.org/tomcat-6.0-doc/class-loader-howto.html" rel="noreferrer">Apache Tomcat: Class Loader HOW-TO</a>: defines how the ClassLoaders work in Tomcat.</li> <li><a href="http://tomcat.apache.org/tomcat-5.5-doc/config/context.html" rel="noreferrer">Tomcat Configuration Reference: The Context Container</a>: how to define your <code>Context</code> element</li> <li><a href="http://tomcat.apache.org/tomcat-5.5-doc/config/loader.html" rel="noreferrer">Tomcat Configuration Reference: The Loader Component</a>: How to define your custom <code>Loader</code> element for your own <code>Context</code>.</li> </ul>
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    1. POHow to set my custom class loader to be the default?
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    1. USTomas Narros
    1. USTomas Narros
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    1. POHow to set my custom class loader to be the default?
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    1. COFor some reason it got me java.lang.Error: java.lang.IllegalStateException: recursive invocation. This is what I did: subclassing ClassLoader, supplying c'tor that take a ClassLoader as parameter, configured it using the -Djava.system.class.loader, and... Boom! Error occurred during initialization of VM :-( Did I miss anything?
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    2. COWithout a sight on your code, I can't tell you for sure.
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    3. COI have tested it with a little Main Application I have, and it's run OK.
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