Jenkins 1.596.3 with java 1.6.24 and web logic 10.3.5, version compatibility

Question

I am working on build automation of oracle SOA 11 g application with jenkins 1.596.3 and java 1.6.24 and web logic 10.3.5.

After deploying the war file called jenkins into web logic results file Unsupported major.minor version 51.0, yes I understood that it's because of different java versions but my system is configured with 1.6.24 jdk.

As I don't have any prior knowledge of jenkins, I started to backtrack everything,

extracting all files from ear file (jenkins) and I checked the classes compiler version by using javap command then the output was version 47 means jdk 1.3.

I don't have source to recompile those classes from jenkins..

what to do now ?

Any help would be greatly appreciated TIA

Answer 1

The Jenkins version (1.596.3) and the class version (51.0) in the UnsupportedClassVersionError do not match. Do you have maybe another (newer) Jenkins deployed before?

# download https://updates.jenkins-ci.org/download/war/1.596.3/jenkins.war
jar xf jenkins.1.596.3.war WEB-INF/lib/jenkins-core-1.596.3.jar
cd WEB-INF/lib
jar xf jenkins-core-1.596.3.jar hudson/WebAppMain.class
javap -v hudson/WebAppMain.class | grep -i "version:"

returns

minor version: 0
major version: 50

Which indicate the class is compiled for Java 1.6.