Hello, I am using the latest Struts2 release - 2.2.1 and have it
declared as a dependecy in Maven:

<dependency>
  <groupId>org.apache.struts</groupId>
  <artifactId>struts2-core</artifactId>
  <version>2.2.1</version>
</dependency>

and I am running on Glassfish 3.1

I have a simple JSP page which includes the <s:debug/> tag in the body

With the debug tag I get the following exception:

Caused by: java.lang.NullPointerException
        at 
org.apache.jasper.compiler.TagLibraryInfoImpl.toString(TagLibraryInfoImpl.java:124)
        at java.lang.String.valueOf(String.java:2826)
        at java.lang.StringBuilder.append(StringBuilder.java:115)
        at java.util.AbstractMap.toString(AbstractMap.java:490)
        at java.lang.String.valueOf(String.java:2826)
        at java.lang.StringBuilder.append(StringBuilder.java:115)
        at java.util.AbstractMap.toString(AbstractMap.java:490)
        at java.lang.String.valueOf(String.java:2826)
        at java.lang.StringBuffer.append(StringBuffer.java:219)
        at 
freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:130)
        at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:93)
        at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
        at freemarker.core.Expression.getStringValue(Expression.java:93)
        at 
freemarker.core.StringBuiltins$StringBuiltIn._getAsTemplateModel(StringBuiltins.java:71)
        at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
        at freemarker.core.Expression.getStringValue(Expression.java:93)
        at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
        at freemarker.core.Environment.visit(Environment.java:210)
        at freemarker.core.IfBlock.accept(IfBlock.java:82)
        at freemarker.core.Environment.visit(Environment.java:210)
        at freemarker.core.MixedContent.accept(MixedContent.java:92)
        at freemarker.core.Environment.visit(Environment.java:210)
        at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:167)
        at freemarker.core.Environment.visit(Environment.java:417)
        at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
        at freemarker.core.Environment.visit(Environment.java:210)
        at freemarker.core.MixedContent.accept(MixedContent.java:92)
        at freemarker.core.Environment.visit(Environment.java:210)
        at freemarker.core.Environment.process(Environment.java:190)
        at freemarker.template.Template.process(Template.java:237)
        at 
org.apache.struts2.components.template.FreemarkerTemplateEngine.renderTemplate(FreemarkerTemplateEngine.java:157)
        at org.apache.struts2.components.UIBean.mergeTemplate(UIBean.java:559)
        at org.apache.struts2.components.UIBean.end(UIBean.java:513)
        ... 93 more

Without the the <s:debug/> tag the page loads and runs fine.
Also if I deploy to Tomcat it works fine.

Can anyone help with this?

Many thanks
Andy Birchall

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