[Building Sakai] ClassNotfound in a tool

[David Haines]

Did you install into a fresh copy of Tomcat?  I've had many problems that just disappeared when I stopped reusing Tomcat installations.  (I've also had many problems that had nothing to do with Tomcat.  YMMV)

- Dave


David Haines
CTools Developer
Digital Media Commons
University of Michigan 
dlhaines at umich.edu




On Apr 15, 2011, at 7:25 AM, Daniel Merino wrote:

> Hi everybody.
> 
> I'm trying to solve, since several days ago, a weird issue with a tool 
> which launches a ClassNotFound exception, relating to a class which is 
> included in the tool's WAR file.
> 
> The class not found is org.sakaiproject.util.BaseResourceProperties, 
> inside sakai-kernel-util, but in the class where the exception is 
> launched (org.sakaiproject.blog.impl.SakaiProxyImpl) 
> BaseResourceProperties is included in the imports and the project 
> compiles OK with Maven.
> 
> Also, I have looked for the lost class in the tool's deployed WAR file 
> and it's included inside its kernel's WAR file.
> 
> I'm using a fresh Sakai 2.7.1 with kernel 1.1.9. The exception is 
> throwed when uploading an image.
> 
> Please, could you give me some advice about what more could I try? I'm 
> stuck with this.
> 
> This is what my catalina.out shows:
> 
> (...)
> Caused by: 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:597)
>        at 
> org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:183)
>        ... 41 more
> Caused by: java.lang.NoClassDefFoundError: 
> org/sakaiproject/util/BaseResourceProperties
>        at 
> org.sakaiproject.blog.impl.SakaiProxyImpl.saveFile(SakaiProxyImpl.java:447)
>        at 
> org.sakaiproject.blog.impl.PersistenceManagerImpl.storeFile(PersistenceManagerImpl.java:404)
>        at 
> org.sakaiproject.blog.impl.PersistenceManagerImpl.addPostElement(PersistenceManagerImpl.java:1179)
>        at 
> org.sakaiproject.blog.impl.PersistenceManagerImpl.addPostElement(PersistenceManagerImpl.java:1153)
>        at 
> org.sakaiproject.blog.impl.BlogManagerImpl.addElement(BlogManagerImpl.java:220)
>        at 
> org.sakaiproject.blog.tool.pages.EditFile$1.onSubmit(EditFile.java:60)
>        at 
> org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1271)
>        at 
> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:769)
>        ... 46 more
> Caused by: java.lang.ClassNotFoundException: 
> org.sakaiproject.util.BaseResourceProperties
>        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>        at java.security.AccessController.doPrivileged(Native Method)
>        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
>        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
>        ... 54 more
> 
> Thanks in advance.
> -- 
> Daniel Merino Echeverría
> daniel.merino at unavarra.es
> Gestor de teleformación - Centro Superior de Innovación Educativa.
> Tfno: 948-168489 - Universidad Pública de Navarra.
> --
> Malgasté mi tiempo, ahora el tiempo me malgasta a mí. (Shakespeare)
> 
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