Eclipse java.lang.InstanceError:org.apache.axis2.databinding.ADBDataSource

我正在尝试使用EclipseIDE和ApacheTomcat（7）开发一个web应用程序。当我将.WAR文件部署到wso2上并打开url时，每次都会出现此错误，尽管使用相同版本的axis2来构建和生成代码。任何帮助都将不胜感激。多谢各位

java.lang.InstantiationError: org.apache.axis2.databinding.ADBDataSource
    org.wso2.carbon.um.ws.api.stub.Authenticate.getOMElement(Authenticate.java:126)
    org.wso2.carbon.um.ws.api.stub.RemoteUserStoreManagerServiceStub.toEnvelope(RemoteUserStoreManagerServiceStub.java:9387)
    org.wso2.carbon.um.ws.api.stub.RemoteUserStoreManagerServiceStub.authenticate(RemoteUserStoreManagerServiceStub.java:4030)
    org.wso2.sample.LoginServlet.authenticate(LoginServlet.java:77)
    org.wso2.sample.LoginServlet.doPost(LoginServlet.java:38)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.wso2.sample.AuthenticationFilter.doFilter(AuthenticationFilter.java:42)