Struts 2 Select tag error
I m beginner in struts 2,

I had try one example from,
            
<http://www.mkyong.com/struts2/struts-2-sselect-drop-down-box-example/>

and then tried to execute that code in eclipse then i will got such unknown error, so any one can help me to solve this error.

I got Error like....

SEVERE: Servlet.service() for servlet jsp threw exception
tag 'select', field 'list', name 'yourSearchEngine': The requested list key 'searchEngine' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]
	at org.apache.struts2.components.Component.fieldError(Component.java:237)
	at org.apache.struts2.components.Component.findValue(Component.java:358)
	at org.apache.struts2.components.ListUIBean.evaluateExtraParams(ListUIBean.java:80)
	at org.apache.struts2.components.Select.evaluateExtraParams(Select.java:105)
	at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:856)
	at org.apache.struts2.components.UIBean.end(UIBean.java:510)
	at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:42)
	at org.apache.jsp.Select_jsp._jspx_meth_s_005fselect_005f0(Select_jsp.java:166)
	at org.apache.jsp.Select_jsp._jspx_meth_s_005fform_005f0(Select_jsp.java:113)
	at org.apache.jsp.Select_jsp._jspService(Select_jsp.java:71)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)

Struts 2 Select tag error
===

I m beginner in struts 2,

I had try one example from,
            
<http://www.mkyong.com/struts2/struts-2-sselect-drop-down-box-example/>

and then tried to execute that code in eclipse then i will got such unknown error, so any one can help me to solve this error.

I got Error like....

SEVERE: Servlet.service() for servlet jsp threw exception
tag 'select', field 'list', name 'yourSearchEngine': The requested list key 'searchEngine' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]
	at org.apache.struts2.components.Component.fieldError(Component.java:237)
	at org.apache.struts2.components.Component.findValue(Component.java:358)
	at org.apache.struts2.components.ListUIBean.evaluateExtraParams(ListUIBean.java:80)
	at org.apache.struts2.components.Select.evaluateExtraParams(Select.java:105)
	at org.apache.struts2.components.UIBean.evaluateParams(UIBean.java:856)
	at org.apache.struts2.components.UIBean.end(UIBean.java:510)
	at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:42)
	at org.apache.jsp.Select_jsp._jspx_meth_s_005fselect_005f0(Select_jsp.java:166)
	at org.apache.jsp.Select_jsp._jspx_meth_s_005fform_005f0(Select_jsp.java:113)
	at org.apache.jsp.Select_jsp._jspService(Select_jsp.java:71)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)
