上流プロジェクト"system-library-update"の#9が実行　
元の原因: 
ユーザーjfutが実行
ビルドします。 ワークスペース: /home/services/jenkins/jobs/system-library-update/workspace/jdk/JDK-1.4
[JDK-1.4] $ /bin/sh -xe /tmp/hudson5198097898078853011.sh
+ cat
+ cat
[JDK-1.4] $ /home/services/jenkins/tools/hudson.tasks.Ant_AntInstallation/LATEST_ANT/bin/ant -Djdk=JDK-1.4
Buildfile: /home/services/jenkins/jobs/system-library-update/workspace/jdk/JDK-1.4/build.xml

BUILD SUCCESSFUL
Total time: 0 seconds
[JDK-1.4] $ /home/services/jenkins/tools/hudson.tasks.Maven_MavenInstallation/LATEST_MAVEN/bin/mvn -Djdk=JDK-1.4 clean
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/maven/cli/MavenCli (Unsupported major.minor version 49.0)
	at java.lang.ClassLoader.defineClass0(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
	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.codehaus.plexus.classworlds.launcher.Launcher.getMainClass(Launcher.java:145)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:267)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Build step 'Mavenの呼び出し' marked build as failure
Finished: FAILURE