[Deploying Sakai] Exception when attempting to add class roster(s)

Robert Drescher robert.drescher at gmail.com
Sat Apr 11 09:22:21 PDT 2009


Hello! 

I finished building and deploying Sakai as described in the Development
Environment walkthrough. 

Now I wanted to create a classroom environment to start implementing and
integrating my custom tools, but I can't create classes. 

 

In "Site Info", I select "Edit Class Roster(s)" and then "Add Roster(s)" an
Sakai is not doing anything visible. 

But when I check the output: 

 

2009-04-11 17:53:32,458  WARN http-80-Processor24
org.sakaiproject.cheftool.VelocityPortletPaneledAction - Exception calling
method doMenu_siteInfo_addClass java.lang.reflect.InvocationTargetException
(Caused by java.lang.NullPointerException)

java.lang.reflect.InvocationTargetException

        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:585)

        at
org.sakaiproject.cheftool.VelocityPortletPaneledAction.actionDispatch(Veloci
tyPortletPaneledAction.java:600)

        at
org.sakaiproject.cheftool.VelocityPortletPaneledAction.processAction(Velocit
yPortletPaneledAction.java:516)

        at org.sakaiproject.cheftool.ToolServlet.doGet(ToolServlet.java:221)

        at
org.sakaiproject.cheftool.VelocityPortletPaneledAction.doGet(VelocityPortlet
PaneledAction.java:1014)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)

        at
org.sakaiproject.vm.ComponentServlet.service(ComponentServlet.java:56)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:269)

        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:188)

        at
org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:561)

        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:215)

        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:188)

        at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.
java:679)

        at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDis
patcher.java:461)

        at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatch
er.java:364)

        at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher
.java:301)

        at
org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveTo
olComponent.java:475)

        at
org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCh
aronPortal.java:1216)

        at
org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:
188)

        at
org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:9
3)

        at
org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPo
rtal.java:768)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:269)

        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:188)

        at
org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:613)

        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:215)

        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:188)

        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:213)

        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:172)

        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127
)

        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117
)

        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:108)

        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)

        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)

        at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processC
onnection(Http11BaseProtocol.java:665)

        at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.jav
a:528)

        at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWo
rkerThread.java:81)

        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:689)

        at java.lang.Thread.run(Thread.java:595)

Caused by: java.lang.NullPointerException

        at
org.sakaiproject.site.tool.SiteAction.doMenu_siteInfo_addClass(SiteAction.ja
va:6072)

        ... 44 more

 

As already mentioned, I followed the walkthrough (so I had no idea what I
was doing, really . ) and created a course site. 

Does this sound to you like a installation/configuration problem or is this
application related? 

Where to start looking for the "root of all evil"? 

 

Thanks for your help! 

Robert

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