Getting UnsupportedClassVersionError Unsupported major.minor version 49.0

[Ravi Kiran Va]

Hi ,

When deployed into Tomcat ,my Application is not able to start and i am getting this Exception on to the Tomcat Logs please help how can i remove this Exception


java.lang.UnsupportedClassVersionError: org/apache/struts2/dispatcher/FilterDispatcher (Unsupported major.minor version 49.0)

[Onkar Joshi]

I think I've seen this happen due to issues with JVM version being used.

Did you compile something with JDK 5 and then try to run it in JVM 1.4? Or maybe some similar 1.4 vs 5 confusion?

[Ravi Kiran Va]

I am sure that i compiled on JRE 1.4., and trying it to run on Tomcat 5.0

Please tell me what JRE does Tomcat5.0 uses

THank you.

[David O'Meara]

I think Tomcat moved to JSE5 from Tomcat version 5.5 but you could install a compatability patch to allow it to use JSE 1.4.
Since the problem is with Struts I think you're just going to have to run Tomcat using JSE5 (or 6) but should still be able to compile against JSE 1.4

[Ravi Kiran Va]

Thank you very much for your time .