I have tomcat6 running on ubuntu, with java 1.6.0\_20.

One of the webapps causes an error, which has as root cause:

> 
> java.lang.ClassNotFoundException: javax.mail.Authenticator
> 
> 
> 

the mail.jar and activation.jar (found these as culprit in my online research) are in the /var/lib/tomcat6/common/lib directory and in the lib directory of the webapp. The javax.mail.Authenticator.class is in mail.jar.

What else can I try to get it to work? are there logs anywhere that can help me find the real error?

update:

* removed the duplicate .jar files to avoid possible conflicts. tried
* running tomcat (on another machine, tomcat7 on windows) with verbose
class loading:

> 
> 
> ```
> [Loaded javax.mail.Address from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.internet.InternetAddress from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.Part from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.BodyPart from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.internet.MimePart from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.internet.MimeBodyPart from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.Multipart from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.internet.MimeMultipart from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.activation.DataSource from C:\Program Files\Java\jdk1.6.0_26\jre\lib\rt.jar]
> [Loaded javax.mail.Message from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded javax.mail.internet.MimeMessage from file:/C:/.../build/web/WEB-INF/lib/mail.jar]
> [Loaded org.apache.naming.factory.MailSessionFactory from file:/C:/Program%20Files/Apache%20Software%20Foundation/Apache%20Tomcat%207.0.11/lib/catalina.jar]
> [Loaded org.apache.naming.factory.MailSessionFactory$1 from file:/C:/Program%20Files/Apache%20Software%20Foundation/Apache%20Tomcat%207.0.11/lib/catalina.jar]
> 28.07.2011 09:24:36 com.sun.faces.lifecycle.LifecycleImpl phase
> WARNUNG: executePhase(RENDER_RESPONSE 6,com.sun.faces.context.FacesContextImpl@698b41da) threw exception
> javax.faces.FacesException: 
> [snip...]
> [...]
> Caused by: java.lang.ClassNotFoundException: javax.mail.Authenticator
> [...]
> 
> ```
> 
> 

So that does not tell me anything new.