Tomcat 6 supports only 1.2, 1.3, 1.4, and Java EE 5 Web Modules

With search, you find a file named Org.eclipse.wst.common.project.facet.core.xml in the. Setting folder under Project, which is configured with various version information. At this point, the problem is solved by modifying the file according to the native configuration.

<?xml version= "1.0" encoding= "UTF-8"?>
<faceted-project>
<runtime name= "Apache Tomcat v5.5"/>
<fixed facet= "Jst.web"/>
<fixed facet= "Jst.java"/>
<installed facet= "Jst.java" version= "5.0"/>
<installed facet= "Jst.web" version= "2.4"/>
<installed facet= "Wst.jsdt.web" version= "1.0"/>
</faceted-project>


For bugs like me, you can download Tomcat 7. 0 solve, but I am busy trouble, simply in the configuration file <installed facet= "Jst.web" version= "3.0"/> To lower version version= "2.5" just fine

Tomcat 6 supports only 1.2, 1.3, 1.4, and Java EE 5 Web Modules