Hi Hemika,
Expand the deployed student management stub osgi bundle and check whether
GetStudents.class class file is in it.
Thanks
On Thu, Oct 9, 2014 at 12:34 PM, Rajeev Sampath <raje...@wso2.com> wrote:
> Hi,
>
> Class loading problems occur if multiple osgi bundles contain the same
> java package (unless they are added as fragment bundles). Check whether the
> 3 bundles you have added contain a common package.
>
>
> Thanks
> Rajeev
>
> On Thu, Oct 9, 2014 at 12:03 PM, Hemika Kodikara <hem...@wso2.com> wrote:
>
>> Hi All,
>>
>> I have been following this tutorial on creating a carbon component [1]. I
>> have created all 3 OSGI bundles and added them to the "dropins" folder.
>> Once I start the carbon server, I see the component I created as
>> "student.menu". But when clicked on it, nothing happens. In the carbon
>> console I see the following error. I have also attached a copy of the tree
>> structure of the "org.wso2.carbon.student.mgt.ui" project and also the
>> content of the "org.wso2.carbon.student.mgt.ui" jar file.
>>
>> ------------------------ The error -------------------------
>>
>> [2014-10-09 11:21:37,920] ERROR
>> {org.apache.catalina.core.ApplicationDispatcher} - Servlet.service() for
>> servlet bridgeservlet threw exception
>> java.lang.ClassNotFoundException: org.wso2.carbon.student.mgt.GetStudents
>> at
>> org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:455)
>> at
>> org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
>> at
>> org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
>> at
>> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
>> at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
>> at
>> org.wso2.carbon.student.mgt.stub.StudentManagerStub.toEnvelope(StudentManagerStub.java:461)
>> at
>> org.wso2.carbon.student.mgt.stub.StudentManagerStub.getStudents(StudentManagerStub.java:169)
>> at
>> org.wso2.carbon.student.mgt.ui.StudentManagerClient.getStudents(StudentManagerClient.java:24)
>> at
>> org.apache.jsp.student_002dmgt.index_jsp._jspService(org.apache.jsp.student_002dmgt.index_jsp:77)
>> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
>> at
>> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
>> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at org.wso2.carbon.ui.JspServlet.service(JspServlet.java:155)
>> at org.wso2.carbon.ui.TilesJspServlet.service(TilesJspServlet.java:80)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.eclipse.equinox.http.helper.ContextPathServletAdaptor.service(ContextPathServletAdaptor.java:37)
>> at
>> org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
>> at
>> org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:128)
>> at
>> org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:68)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.service(DelegationServlet.java:68)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>> at
>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
>> at
>> org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:605)
>> at
>> org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:544)
>> at
>> org.eclipse.equinox.http.servlet.internal.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:37)
>> at
>> org.eclipse.equinox.http.helper.ContextPathServletAdaptor$RequestDispatcherAdaptor.include(ContextPathServletAdaptor.java:369)
>> at
>> org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:1015)
>> at
>> org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:700)
>> at sun.reflect.GeneratedMethodAccessor37.invoke(Unknown Source)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:601)
>> at org.apache.tiles.jsp.context.JspUtil.doInclude(JspUtil.java:87)
>> at
>> org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:88)
>> at
>> org.apache.tiles.jsp.context.JspTilesRequestContext.dispatch(JspTilesRequestContext.java:82)
>> at
>> org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:465)
>> at
>> org.apache.tiles.jsp.taglib.InsertAttributeTag.render(InsertAttributeTag.java:140)
>> at
>> org.apache.tiles.jsp.taglib.InsertAttributeTag.render(InsertAttributeTag.java:117)
>> at
>> org.apache.tiles.jsp.taglib.RenderTagSupport.execute(RenderTagSupport.java:171)
>> at
>> org.apache.tiles.jsp.taglib.RoleSecurityTagSupport.doEndTag(RoleSecurityTagSupport.java:75)
>> at
>> org.apache.tiles.jsp.taglib.ContainerTagSupport.doEndTag(ContainerTagSupport.java:80)
>> at
>> org.apache.jsp.admin.layout.template_jsp._jspx_meth_tiles_insertAttribute_7(org.apache.jsp.admin.layout.template_jsp:603)
>> at
>> org.apache.jsp.admin.layout.template_jsp._jspService(org.apache.jsp.admin.layout.template_jsp:335)
>> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
>> at
>> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
>> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at org.wso2.carbon.ui.JspServlet.service(JspServlet.java:155)
>> at org.wso2.carbon.ui.TilesJspServlet.service(TilesJspServlet.java:80)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.eclipse.equinox.http.helper.ContextPathServletAdaptor.service(ContextPathServletAdaptor.java:37)
>> at
>> org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
>> at
>> org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:128)
>> at
>> org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:68)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.service(DelegationServlet.java:68)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>> at
>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
>> at
>> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
>> at
>> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
>> at
>> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
>> at
>> org.eclipse.equinox.http.servlet.internal.RequestDispatcherAdaptor.forward(RequestDispatcherAdaptor.java:30)
>> at
>> org.eclipse.equinox.http.helper.ContextPathServletAdaptor$RequestDispatcherAdaptor.forward(ContextPathServletAdaptor.java:362)
>> at
>> org.apache.tiles.servlet.context.ServletTilesRequestContext.forward(ServletTilesRequestContext.java:198)
>> at
>> org.apache.tiles.servlet.context.ServletTilesRequestContext.dispatch(ServletTilesRequestContext.java:185)
>> at
>> org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:419)
>> at
>> org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:370)
>> at org.wso2.carbon.ui.action.ActionHelper.render(ActionHelper.java:52)
>> at org.wso2.carbon.ui.TilesJspServlet.service(TilesJspServlet.java:101)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.eclipse.equinox.http.helper.ContextPathServletAdaptor.service(ContextPathServletAdaptor.java:37)
>> at
>> org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61)
>> at
>> org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:128)
>> at
>> org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:68)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
>> at
>> org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.service(DelegationServlet.java:68)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>> at
>> org.wso2.carbon.tomcat.ext.filter.CharacterSetFilter.doFilter(CharacterSetFilter.java:61)
>> 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:222)
>> at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
>> at
>> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
>> at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
>> at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
>> at
>> org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:178)
>> at
>> org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:49)
>> at
>> org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:141)
>> at
>> org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:156)
>> at
>> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
>> at
>> org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:52)
>> 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:1004)
>> at
>> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
>> at
>> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1653)
>> at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>> at java.lang.Thread.run(Thread.java:722)
>>
>> ------------------- The Error -----------------------
>>
>>
>> [1] -
>> http://wso2.com/library/tutorials/2014/03/how-to-write-a-wso2-carbon-component/
>>
>> Thanks.
>>
>>
>> Hemika Kodikara
>> Software Engineer
>> WSO2 Inc.
>> lean . enterprise . middleware
>> http://wso2.com
>>
>> Mobile : +94777688882
>>
>> _______________________________________________
>> Dev mailing list
>> Dev@wso2.org
>> http://wso2.org/cgi-bin/mailman/listinfo/dev
>>
>>
>
>
> --
> Rajeev Sampath
> Senior Software Engineer
> WSO2, Inc.; http://www.wso2.com.
>
> Mobile:
> * +94716265766 <%2B94716265766>*
>
> _______________________________________________
> Dev mailing list
> Dev@wso2.org
> http://wso2.org/cgi-bin/mailman/listinfo/dev
>
>
--
Lahiru Chandima
*Senior Software Engineer*
Mobile : +94 (0) 772 253283
lahi...@wso2.com
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