[WW-4422] Component inside Component - "Could not render JSP template"

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 2.3.16.3
• Component/s: Other
• Labels: component

Environment

Windows, Pluto Portlets

• Assignee: Unassigned
• Reporter: Mark Goertzen
• Created: 20/Nov/14 22:10
• Updated: 17/Oct/22 05:25
• Resolved: 17/Oct/22 05:25

Description

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:

<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>

Note that param body is rendered inside someTemplate.jsp like this:

<s:property value="%{parameters.body}" escapeHtml="false" />

eg. This will work exactly as expected:

<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>

Note that the "if" tag can be any struts tag and it will work.