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https://issues.apache.org/jira/browse/WW-4422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15501161#comment-15501161
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Stefaan Dutry commented on WW-4422:
-----------------------------------
Problem seems to be a different instance of the PageContextImpl.
{code:none|title=debugging when error occurs (inside JspTemplateEngine)}
org.apache.struts2.components.template.TemplateRenderingContext@6b911886
com.opensymphony.xwork2.ognl.OgnlValueStack@53a1b9bd
org.apache.jasper.runtime.PageContextImpl@7ec4b210
org.apache.struts2.components.template.TemplateRenderingContext@155b953e
com.opensymphony.xwork2.ognl.OgnlValueStack@53a1b9bd
org.apache.jasper.runtime.PageContextImpl@3641544e
{code}
{code:none|title=debugging when error doesn't occur (inside JspTemplateEngine)}
org.apache.struts2.components.template.TemplateRenderingContext@504bd225
com.opensymphony.xwork2.ognl.OgnlValueStack@73183b04
org.apache.jasper.runtime.PageContextImpl@747ebde6
org.apache.struts2.components.template.TemplateRenderingContext@35e53a71
com.opensymphony.xwork2.ognl.OgnlValueStack@73183b04
org.apache.jasper.runtime.PageContextImpl@747ebde6
{code}
> Component inside Component - "Could not render JSP template"
> ------------------------------------------------------------
>
> Key: WW-4422
> URL: https://issues.apache.org/jira/browse/WW-4422
> Project: Struts 2
> Issue Type: Bug
> Components: Other
> Affects Versions: 2.3.16.3
> Environment: Windows, Pluto Portlets
> Reporter: Mark Goertzen
> Labels: component
> Fix For: 2.3.31, 2.5.3
>
>
> Trying to render a Component inside a Component will fail with logged error
> "JspTemplateEngine.error(34) | Could not render JSP template". There is a
> workaround, which is simply to have ANY struts tag after the inner component
> declared in the <param> of the outer component. Also, the inner component
> only causes this failure when it has struts tags inside it.
> eg. This fails:
> {code:xml}
> <s:component ... template="someTemplate.jsp">
> <s:param name="body">
> <s:component ... template="otherTemplate.jsp"><!-- only fails if there is
> struts tag(s) inside otherTemplate.jsp -->
> <!--other params-->
> </s:component>
> </s:param>
> <s:component>
> {code}
> Note that param body is rendered inside someTemplate.jsp like this:
> {code:xml}
> <s:property value="%{parameters.body}" escapeHtml="false" />
> {code}
> eg. This will work exactly as expected:
> {code:xml}
> <s:component ... template="someTemplate.jsp">
> <s:param name="body">
> <s:component ... template="otherTemplate.jsp"><!-- only fails if there is
> struts tag(s) inside this template -->
> <!--other params-->
> </s:component>
> <s:if test=""><!-- DO NOT DELETE THIS LINE - Fixes "component inside
> component" bug in Struts 2.3.16.3 --></s:if>
> </s:param>
> <s:component>
> {code}
> Note that the "if" tag can be any struts tag and it will work.
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