Struts2 jQuery struts-plugin.xml invalid

Question

I have setup a project which is a combo of Struts2 + Springs + JPA.

I recently came across the Struts2-Jquery Plugin

Using this plugin (struts2-jquery-plugin-3.5.1.jar) in my project I got an error

Unable to load jar:file:/H:/My%20Project/phase1/build/web/WEB-INF/lib/struts2-jquery-plugin-3.5.1.jar!/struts-plugin.xml - Class: java.net.PlainSocketImpl
File: PlainSocketImpl.java
Method: connect
Line: 195 - java/net/PlainSocketImpl.java:195:-1
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:909)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:154)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:121)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:179)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
    ... 48 more


 Caused by: java.net.UnknownHostException: struts.apache.org
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:195)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:529)
        at java.net.Socket.connect(Socket.java:478)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
        at sun.net.www.http.HttpClient.New(HttpClient.java:306)
        at sun.net.www.http.HttpClient.New(HttpClient.java:323)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1172)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:677)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:1315)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:1282)
        at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:283)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(XMLDocumentScannerImpl.java:1194)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(XMLDocumentScannerImpl.java:1090)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:1003)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
        at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
        at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:113)
        ... 53 more

The solution to this particular error was given here as Struts2 DTD problem.

Acting in the solution given in the above link.. updated three libraries in my webapp lib folder:

Struts2-core-2.3.4.1
struts2-spring-plugin-2.3.4.1
xwork-core-2.3.4.1

When trying to deploy after this update I got this stacktrace

SEVERE: Exception starting filter struts2
java.lang.NoClassDefFoundError: org/apache/commons/lang3/StringUtils
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:209)
    at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:102)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:210)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:390)
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:437)
    at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
    at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277)
    at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258)
    at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382)
    at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103)
    at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4649)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5305)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:650)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:531)
    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1468)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
    at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1436)
    at org.apache.catalina.manager.ManagerServlet.deploy(ManagerServlet.java:856)
    at org.apache.catalina.manager.ManagerServlet.doGet(ManagerServlet.java:353)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.StringUtils
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
    ... 52 more

Can anyone give me a pointer where I am going wrong ?

You may have multiple versions of `commons-lang3-xxxx.jar`. Pay attention to the `3`. — Andrea Ligios, Mar 22 '13 at 08:22
@AndreaLigios :) i dont have any commons-lang3-xxx.jar in my app The commons i included are just commons-collections-3.1.jar, commons-fileupload-1.2.1.jar, commons-io-1.3.2.jar, commons-logging-1.1.1.jar — shridatt, Mar 22 '13 at 08:35
@AndreaLigios Looks like that solves the problem for application to run :)... But jquery Plugin not working.... Used a simple anchor tag targeting a div to change the content inside the div, but no success! — shridatt, Mar 22 '13 at 09:34
Then this is another question :) Be sure to take a look at the http://struts.jgeppert.com/struts2-jquery-showcase/index.action. I'll Add the comment as answer to help future visitors with the same problem. — Andrea Ligios, Mar 22 '13 at 09:46
@AndreaLigios My bad ... hehe :) had forgotten to include :P.... Works awesome now! — shridatt, Mar 22 '13 at 10:22
Great! This (sj:head) happened to my coworker too some time ago, I guess it's pretty common :) — Andrea Ligios, Mar 22 '13 at 10:34
possible duplicate of [NoClassDefFoundError: org/apache/commons/lang3/StringUtils](http://stackoverflow.com/questions/28504174/noclassdeffounderror-org-apache-commons-lang3-stringutils) — kenorb, Jun 03 '15 at 20:43

score 3 · Accepted Answer · edited Jun 03 '15 at 20:40

3

You need to add the commons-lang3-3.x.jar to your classpath for the filter to run.

You must ensure you don't have multiple versions of commons-lang3-x.x.jar too.

commons-lang3-x.x.jar and commons-lang-x.x.jar instead can coexist in the same classpath, because the package is different (they did it on purpose ;)

This can be known, because of NoClassDefFoundError:

java.lang.NoClassDefFoundError: org/apache/commons/lang3/StringUtils.

which occurs mostly in two cases:

at runtime, you doesn't have the library,
or you have two versions of the library, hence the classloader doesn't know which to pick, and raises the exception.

The lang3 in the package means that the StringUtils class missing is from common-lang3-*.jar, not from common-lang-*.jar.

edited Jun 03 '15 at 20:40

kenorb

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answered Mar 22 '13 at 09:50

Andrea Ligios

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1

How did u spotted he is missing commons-lang3-x.x.jar – Java Beginner May 31 '13 at 05:07
1

Because of `java.lang.NoClassDefFoundError: org/apache/commons/lang3/StringUtils`. NoClassDefFoundError occurs mostly in two cases: at runtime, you doesn't have the library, or you have two versions of the library, hence the classloader doesn't know which to pick, and raises the exception. The `lang3` in the package means that the StringUtils class missing is from `common-lang3-*.jar`, not from `common-lang-*.jar` ;) – Andrea Ligios May 31 '13 at 08:17

Struts2 jQuery struts-plugin.xml invalid

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