Up to ValidatorFaq


4. November 2002

I am getting a really strange behaviour when using the struts validator. Infact I am beginning to wonder whether it´s just me going nuts! It´s an error that makes no sense to me at all!

Here´s the scenario:

  1. Start tomcat
  2. open browser
  3. go to form in html page
  4. send

Now the strange thing is that every second time (after closing the 2 of course) I carry out the steps described above I get a

 java.lang.NoClassDefFoundError: org.apache.struts.validator.ValidatorForm

error! Why not every time or even never?! It just doesn´t make sense t o me that this error comes in exactly the interval as described above. Has anybody else experienced a similar problem which might be worth sharing?

I know it sounds silly but that is exactly what is happening!

Answer

It seems that this is a session issue and the solution was to change the context in the tomcat server.xml:

I.e. I added:

<Manager className="org.apache.catalina.session.PersistentManager"
   debug="4"
   saveOnRestart="false"  <-------
   maxActiveSessions="-1"
   minIdleSwap="-1"
   maxIdleSwap="-1"
   maxIdleBackup="-1">
   <Store className="org.apache.catalina.session.FileStore"/>
</Manager>

to my Context.

Michael Delamere


Up to ValidatorFaq

ValidatorNoClassDefFound (last edited 2009-09-20 23:48:37 by localhost)