I am using the new tag lib description provided for Application Platform. It defines listeners as well. Snap of the taglib is below

webMethods Integration Server Custom Tag Library
webMethods web taglib
http://webm-taglib.tld Execute a service and return the result to the JSP invoke JSP fully qualified IS service name (e.g. wm.server:ping) serviceName true false

But when i start my web application, it gives startup exception -

Caused by: java.lang.IllegalArgumentException: Unable to create an instance of type []
at org.apache.catalina.core.ApplicationContext.addListener(
at org.apache.catalina.core.ApplicationContextFacade.addListener(
at org.apache.jasper.servlet.JasperInitializer.onStartup(
at org.apache.catalina.core.StandardContext.startInternal(
at org.apache.catalina.util.LifecycleBase.start(
… 10 more
Caused by: java.lang.ClassNotFoundException:
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(
at org.apache.catalina.core.DefaultInstanceManager.loadClass(
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(
at org.apache.catalina.core.DefaultInstanceManager.newInstance(
at org.apache.catalina.core.ApplicationContext.addListener(

Hello, Have you installed all the fixes for this 10.3 release? This sounds like something that was resolved with the first 10.3 fix.
Fix for Application Platform Server Service Integration 10.3.0 wMFix.PLSIS_10.3.0.0001-0219