Unsupported class version while calling web service [duplicate]

Question

I am using jre 1.5 tomcat server. In my application I am calling a web service. When I call the web service I got the following error.

java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)

So I found that the problem is with jax-ws jar file.

I am using following jar file in my application build path.

jaxws-api-2.0.jar

I just added only this jar file. I suspect this jar is not compiled under jre 1.5.

Please help me how to get rid of this issue. Or point me to a jar file which can work under jre 1.5.

Java 1.5 is rather old in the meantime, any chance to upgrade? — Henry
– Henry, Commented May 31, 2014 at 8:06
@RomanC I tried that .. My Compiler and everything is in JDK 1.5 only.. JRE1.5 only.. And I can fiund least version for jax-ws is jaxws-api-2.0.jar which is not spporting .. — Rookie007
– Rookie007, Commented May 31, 2014 at 8:12
You would really really be better off upgrading - it's worth putting significant effort into that. JDK 1.5 is over 10 years old now... how confident are you that there aren't security problems that haven't been patched on your machine? — Jon Skeet
– Jon Skeet, Commented May 31, 2014 at 8:16
"No chance to upgrade" - why? Seriously, if you are running a Tomcat server, upgrading your JVM is always a possibility. The only plausible reason not to is that your management is clinically risk averse ... and ignorant of the risks of running old / unpatched software. — Stephen C
– Stephen C, Commented May 31, 2014 at 8:28

Community · Accepted Answer · 2017-05-23 12:23:47Z

2

Firstly, your best option is upgrade to Java 7 (or better still 8), and consider upgrading to a more recent release of Tomcat.

The Java 5 platform is truly ancient, and (free) security patches were discontinued a number of years ago. So unless you are paying for Oracle Java maintenance, your JVM is likely to have a number of unpatched security flaws in it.

There is really no solid reason to not upgrade if you are running Tomcat, especially since you are apparently building / deploying new webapps to it.

If you can't, then your best bet is to download the source code for the JAXWS 2.0 API and attempt to compile it with a Java 5 compiler. However:

I've not been able to track down the JAXWS 2.0 API source code. The closest I could find was 2.2.
There is a chance that the JAXWS 2.x API source code won't compile under Java 5.

Collectives™ on Stack Overflow

Unsupported class version while calling web service [duplicate]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related