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This is the place to find documentation about the Petals Web Console requirements.
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Because Petals Webconsole use a number of classes and interfaces that describe
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and define the contracts between a servlet class (of *2.5 Servlet Specification API*), you
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need to use  runtime environment which provided it.
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So, if you want to run the Petals Webconsole, you need to have a servlet container which
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+support+ 2.5 Java ServletSpecification API, for example _Tomcat 6, Jetty 7, JBoss 5.1 GA_.
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You can verify if you Java web server provide the 2.5 Servlet Specification API, by
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checking in the server librairies the "_servlet-api.jar_" and verify if the Manifest file
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correctly contains "_Specification-Version: 2.5_".

h1. Context parameters:

If you deploy the Webconsole with apache Tomcat, take attention to don't set to "true"

the "*reloadable*" context parameter in the _server.xml_ file of your web server.
{code:language=xml|title=server configuration file} <Context docBase="petals-webconsole-ui" path="/petals-webconsole-ui" reloadable="false" source="org.eclipse.jst.j2ee.server:petals-webconsole-ui" debug="0">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm" digest="SHA-1" resourceName="UserDatabase"/>
</Context>{code}
As is signified in the Tomcat documentation for "reloadable" parameter :

You'll be really annoying, because it will require you to login again.