In Eclipse I am getting 5 warnings for my build.xml:
taskdef class.org.apache.catalina.ant.InstallTask cannot be found
taskdef class.org.apache.catalina.ant.
If you are using eclipes then you need to change your ant_home location by following below steps, navigate to window>prefrances>Ant>runtime>classpath>AntHome click on anthome button and provide your anthome directory path.
and to solv ur problem u need to copy catalina-ant.jar inside anthome/lib folder
Thanks, Sharad