title: Caused by: javax.servlet.ServletException: javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in &lt;forEach&gt;
body: <p>I am using the following code,</p>
  
  <p>The xxx - is the <code>LinkedHashMap</code></p>
  
  <p>The yyy - is the <code>HashMap</code></p>
  
  <p>When I iterate the <code>yyy</code>, the following error occurred. Can you please anypone explain about this <strong>error</strong> and <em>what is the solution for this</em>. </p>
  
  <pre><code>&lt;c:forEach var="aaa" items="${xxx}"&gt;
  &lt;c:set var="yyy" value="${projects.key}"/&gt;
  &lt;c:forEach var="test" items="${yyy}"&gt;                                                                 
  &lt;/c:forEach&gt;
  &lt;/c:forEach&gt;
  </code></pre>