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POjava.lang.SecurityException in Struts2 with display tag
 

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    <p>HelloWorld is my ActionSupport class and the pop method is loading the values to countryList object of Country class type.</p> <pre><code>package example; import com.opensymphony.xwork2.ActionSupport; import java.util.ArrayList; public class HelloWorld extends ActionSupport { ArrayList&lt;Country&gt; countryList = new ArrayList&lt;Country&gt;(); public ArrayList&lt;Country&gt; getCountryList() { return countryList; } public void setCountryList(ArrayList&lt;Country&gt; countryList) { this.countryList = countryList; } public String pop() { countryList.add(new Country("IND", "INDIA")); countryList.add(new Country("PAK", "PAKISTAN")); System.out.println("countryList " + countryList); return SUCCESS; } @Override public String execute() throws Exception { return SUCCESS; } } </code></pre> <p>The <strong>struts.xml</strong> is </p> <pre><code>&lt;struts&gt; &lt;package name="example" namespace="/example" extends="struts-default"&gt; &lt;action name="HelloWorld" method="pop" class="example.HelloWorld"&gt; &lt;result name="success"&gt;/example/HelloWorld.jsp&lt;/result&gt; &lt;/action&gt; &lt;/package&gt; &lt;/struts&gt; </code></pre> <p>and <strong>jsp page</strong> is:</p> <pre><code>&lt;%@taglib uri="http://displaytag.sf.net" prefix="display" %&gt; &lt;%@ taglib prefix="s" uri="/struts-tags" %&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; HAI &lt;display:table name="${countryList}" class="Country" uid="row" pagesize="20" sort="list" requestURI="/example/HelloWorld" &gt; &lt;display:column property="id" title="ID" /&gt; &lt;display:column property="name" /&gt; &lt;/display:table&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>When i run this application,it shows the following error :</p> <p><strong>description</strong> The server encountered an internal error () that prevented it from fulfilling this request.</p> <p><strong>exception</strong> javax.servlet.ServletException: java.lang.SecurityException: class "org.apache.commons.collections.FastHashMap"'s signer information does not match signer information of other classes in the same package</p> <p><strong>root cause</strong> java.lang.SecurityException: class "org.apache.commons.collections.FastHashMap"'s signer information does not match signer information of other classes in the same packa</p> <p>Please solve this.</p>
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    1. USuser871611
    1. USMaster Mind
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    1. COcan you just try with simple iterator tag of struts2 to check if this is being caused by display tag?
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      1. USUmesh Awasthi
 

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