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https://issues.apache.org/struts/browse/WW-2995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=46231#action_46231
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Sam S. Wang commented on WW-2995:
---------------------------------

Problem solved!!
Struts version: 2.0.14
WebLogic: 9.2

It was caused by lacking of namespace declared in web.xml and that's required 
by WebLogic.
Please check your web.xml and fill in the namespaces for web-app as following:

<web-app xmlns="http://java.sun.com/xml/ns/j2ee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";
version="2.4">
..............................
..............................
..............................

This worked for me. Good luck!

> NullPointerException on ComponentTagSupport.doStartTag using jsp:include or 
> s:include
> -------------------------------------------------------------------------------------
>
>                 Key: WW-2995
>                 URL: https://issues.apache.org/struts/browse/WW-2995
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Plugin - Tags
>    Affects Versions: 2.0.14
>         Environment: Windows Vista 32-bit and Red Hat 4 WebLogic 10.3
>            Reporter: Nestor Boscan
>         Attachments: MyAction.rar, myaction2.war
>
>
> When using jsp:include or s:include in a JSP page the next Struts 2 tags will 
> throw:
> java.lang.NullPointerException
>       at 
> org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:50)
> This happens with WebLogic 10.3 but doesn't happen in OC4J 10.1.3.4.

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