Trying to get Hibernate set-up with Struts and Tomcat ... little luck. At this point I'm getting a very strange error:

java.lang.NoClassDefFoundError: javax/transaction/Synchronization

that happens when I invoke my action. Strack trace shows it's bailing here:

Session session = sf.openSession();

Really can't figure this one out. I verified I all have all the required jars, and if I look at debug output I see hibernate2.jar being loaded ???

Any help would be appreciated.

Are you sure you are not missing jta.jar?

Well, you were right. I didn't have that jar in my WEB-INF directory. But I got to tell ya, that just added to my confusion. This page:

http://www.hibernate.org/hib_docs/refer ... start.html

Doesn't list jta.jar as being required, and the /lib/read.me says it's only required if I'm not using an Application Server. I'm using Tomcat 5 ... which is an application server, no? Why in the world would I need to include that manually?

No, actually Tomcat is no application server, it is just a servlet container. You can leave jta.jar if you are using a complete J2EE container, like JBoss, Websphere, Weblogic or whatever.

You need to include jta.jar if not deploying to a JTA-enabled application server. Tomcat does not provide a JTA implementation out-of-the-box, so you need to include jta.jar there. You can add it to Tomcat's common/lib directory, though, instead of including it in your web app's WEB-INF/lib.

Juergen

OK, cool. THanks for the TIP. I really appreciate it.

Note:
For some reason, placing jta.jar in common/lib (or shared/lib, or WEB-INF/lib, for crying out loud!) did not work for me on Win2K with Tomcat 5.0.27. I had to add it to the CLASSPATH in bin/setclasspath.bat: