Started by an SCM change
Running as SYSTEM
Building in workspace /var/lib/jenkins/jobs/s2container-2.4-s2tiger/workspace
The recommended git tool is: NONE
No credentials specified
 > git rev-parse --resolve-git-dir /var/lib/jenkins/jobs/s2container-2.4-s2tiger/workspace/.git # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url https://github.com/seasarorg/seasar2.git # timeout=10
Fetching upstream changes from https://github.com/seasarorg/seasar2.git
 > git --version # timeout=10
 > git --version # 'git version 2.43.5'
 > git fetch --tags --force --progress -- https://github.com/seasarorg/seasar2.git +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git rev-parse refs/remotes/origin/master^{commit} # timeout=10
Checking out Revision db46d1f5891159eb5ef6aab3a40af7b0e0885377 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f db46d1f5891159eb5ef6aab3a40af7b0e0885377 # timeout=10
Commit message: "Merge branch 'jfut-cleanup-test-file'"
First time build. Skipping changelog.
Parsing POMs
Established TCP socket on 28701
[s2-tiger] $ /var/lib/jenkins/tools/hudson.model.JDK/JDK-1.5/bin/java -cp /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven-agent-1.14.jar:/var/lib/jenkins/tools/hudson.tasks.Maven_MavenInstallation/MAVEN-2.0.9/boot/classworlds-1.1.jar hudson.maven.agent.Main /var/lib/jenkins/tools/hudson.tasks.Maven_MavenInstallation/MAVEN-2.0.9 /var/cache/jenkins/war/WEB-INF/lib/remoting-3261.v9c670a_4748a_9.jar /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven-interceptor-1.14.jar 28701
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$1.run(URLClassLoader.java:195)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
ERROR: Failed to launch Maven. Exit code = 1
Started calculate disk usage of build
Finished Calculation of disk usage of build in 0 seconds
Started calculate disk usage of workspace
Finished Calculation of disk usage of workspace in 0 seconds
Finished: FAILURE