title: org.apache.jasper.JasperException:
body: <p>In my jsp page</p>
  
  <pre><code>       &lt;s:if test="#alist[0].aboutme!=null"  test="#alist[0].aboutme!=''"&gt;
           &lt;div class="info"&gt;
              &lt;div class="title"&gt;
                 About
              &lt;/div&gt;
              &lt;div class="value"&gt;
                 &lt;div class="value_title"&gt;
                      &lt;s:property value="alist[0].aboutme"/&gt;
                 &lt;/div&gt;
              &lt;/div&gt;
           &lt;/div&gt;
         &lt;/s:if&gt;
  </code></pre>
  
  <p>I am checking ArrayList alist[0] about me value if it is null or '' 
  It will not show aboutme text and value
  previously it was working properly but now it is showing following  Exception</p>
  
  <pre><code>HTTP Status 500 -
  
  type Exception report
  
  message
  
  description The server encountered an internal error () that prevented it from fulfilling this request.
  
  exception
  
  org.apache.jasper.JasperException: /pages/profile/about.jsp (line: 67, column: 102)   Attribute qualified names must be unique within an element
  org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
  org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:408)
  org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:89)
  org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:171)
  org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:153)
  org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1236)
  org.apache.jasper.compiler.Parser.parseElements(Parser.java:1452)
  org.apache.jasper.compiler.Parser.parse(Parser.java:138)
  org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242)
  org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
  org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
  org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
  org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
  org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
  org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
  org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
  org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
  org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
  javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
  </code></pre>