eclipse - HTTP Status 500 - java.lang.ClassNotFoundException -


i doing project struts, using eclipse juno , tomcat 7, when trying run project on server error:

http status 500 - java.lang.classnotfoundexception

and here description:

description: server encountered internal error prevented fulfilling request.  exception  javax.servlet.servletexception: java.lang.classnotfoundexception: com.project.helloworldaction org.apache.struts.chain.composablerequestprocessor.process(composablerequestprocessor.java:286) org.apache.struts.action.actionservlet.process(actionservlet.java:1913) org.apache.struts.action.actionservlet.doget(actionservlet.java:449) javax.servlet.http.httpservlet.service(httpservlet.java:621) javax.servlet.http.httpservlet.service(httpservlet.java:728)  root cause  java.lang.classnotfoundexception: com.project.helloworldaction org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1713) org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1558) org.apache.struts.chain.commands.util.classutils.getapplicationclass(classutils.java:54) org.apache.struts.chain.commands.util.classutils.getapplicationinstance(classutils.java:71) org.apache.struts.chain.commands.servlet.createaction.createaction(createaction.java:98) org.apache.struts.chain.commands.servlet.createaction.getaction(createaction.java:68) org.apache.struts.chain.commands.abstractcreateaction.execute(abstractcreateaction.java:91) org.apache.struts.chain.commands.actioncommandbase.execute(actioncommandbase.java:51) org.apache.commons.chain.impl.chainbase.execute(chainbase.java:191) org.apache.commons.chain.generic.lookupcommand.execute(lookupcommand.java:305) org.apache.commons.chain.impl.chainbase.execute(chainbase.java:191) org.apache.struts.chain.composablerequestprocessor.process(composablerequestprocessor.java:283) org.apache.struts.action.actionservlet.process(actionservlet.java:1913) org.apache.struts.action.actionservlet.doget(actionservlet.java:449) javax.servlet.http.httpservlet.service(httpservlet.java:621) javax.servlet.http.httpservlet.service(httpservlet.java:728)

anybody knows wrong? if need see parts of code or more information please let me know edit.


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