[Solved]-org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]-eclipse

servlet-api.jar - is wrong in your list of application libs. this jar file (or evivalent) must be supplied by servlet container (tomcat).

i have used "invoker" in my web.xml and after too much investigation i found that its no longer after tomcat 6.

remove this invoker and mapped all the servlet with /servlet/servlet.class.fully.qualified.name in servlet-mapping

maybe you forgot "/" in servlet-mapping. like this:

<servlet-mapping>
    <servlet-name>testservlet</servlet-name>
    <url-pattern>test</url-pattern>
</servlet-mapping>