Failed to load or instantiate TagExtraInfo class: com.ibm.ws.portletcontainer.tags.DefineObjectsTag

Failed to load or instantiate TagExtraInfo class: com.ibm.ws.portletcontainer.tags.DefineObjectsTag

Migrating a portlet application from Websphere Portal to Liferay can bring some problems. One of the problems that i faced has to do with the taglibs used in JSP. 

To be able to use the tag

you have to set the include for the portlet taglib, like this:

<%@taglib uri="http://java.sun.com/portlet" prefix="portlet" %>

In Websphere that taglib location is in the class:

com.ibm.ws.portletcontainer.tags

If you try to run the application, you'll have the error:

 Failed to load or instantiate TagExtraInfo class: com.ibm.ws.portletcontainer.tags.DefineObjectsTag

because Liferay can't find that class. 

How to fix it?

Edit the applications web.xml file, and add

http://java.sun.com/portlet_2_0
/WEB-INF/tld/liferay-portlet.tld

 

Note that you have to have the tld file in the location you provide.

And that's it.