Hi,
since today we are getting the following exception when building PDFBox
Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version
number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at
org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:386)
at
org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
at
org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at
org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:135)
at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:64)
The 1.8-branch [1] is the only affected PDFBox build. It uses "JDK 5 (latest)"
and "Maven 3.0.3". The latter doesn't seems to be compiled with a 1.5 compatible
JDK but with java 6 or newer. As it works before there has to be a incompatible
change in the configuration of the ubuntu slaves. It looks as if there wasn't
any jdk5 installed before and jenkins automatically switched to a jdk7.
The question is what maven version can be used in combination with jdk5 latest?
Is there any maven 3 version compatible with java 5?
BR
Andreas Lehmkühler
[1] https://builds.apache.org/job/PDFBox%201.8.x/
