title: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/tx]
body: <p>I am trying ro run the spring project (which configuration files are listed <a href="https://stackoverflow.com/questions/22401336/spring-security-running-the-webapp-causes-an-exception-incompatibleclasschangee">here</a>, but I am getting the following error in the eclipse console:</p>
  
  <pre><code>Grave: Allocate exception for servlet sdnext
  org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springframework.org/schema/tx]
  Offending resource: ServletContext resource [/WEB-INF/sdnext-servlet.xml]
  
      at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68)
      at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85)
      at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:80)
      at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.error(BeanDefinitionParserDelegate.java:318)
      at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1435)
      at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1428)
      at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:185)
      at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:139)
      at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:108)
      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
      at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
      at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
      at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
      at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
      at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125)
      at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)
      at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
      at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)
      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)
      at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:651)
      at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:599)
      at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:665)
      at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:518)
      at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:459)
      at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
      at javax.servlet.GenericServlet.init(GenericServlet.java:160)
      at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)
      at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193)
      at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:865)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:136)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
      at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
      at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
      at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
      at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:744)
  </code></pre>
  
  <p>The configuration files are exactly the same as listed in the other question, but I change my list of JARs to this (due to some problems with its versions):</p>
  
  <pre><code>commons-logging-1.1.1.jar
  javax.servlet.jsp.jstl-1.2.1.jar
  javax.servlet.jsp.jstl-api-1.2.1.jar
  postgresql-9.3-1100.jdbc3.jar
  spring-beans-3.2.4.RELEASE.jar
  spring-context-3.2.4.RELEASE.jar
  spring-core-3.2.4.RELEASE.jar
  spring-security-core-3.2.0.RELEASE.jar
  spring-web-3.2.4.RELEASE.jar
  spring-webmvc-3.2.4.RELEASE.jar
  </code></pre>
  
  <p>Someone knows how to solve this problem?</p>