See https://builds.apache.org/job/ZooKeeper-trunk/3287/
################################################################################### ########################## LAST 60 LINES OF THE CONSOLE ########################### [...truncated 3.80 KB...] POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 10240 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited 60000 /home/jenkins/tools/ant/latest/bin/ant clean Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/tools/ant/launch/Launcher : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482) Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/tools/ant/launch/Launcher : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482) mv: cannot stat 'build/*.tar.gz': No such file or directory mv: cannot stat 'build/*.jar': No such file or directory mv: cannot stat 'build/test/findbugs': No such file or directory mv: cannot stat 'build/docs/api': No such file or directory Build Failed Build step 'Execute shell' marked build as failure [FINDBUGS] Skipping publisher since build result is FAILURE [WARNINGS] Skipping publisher since build result is FAILURE Archiving artifacts Setting JDK_1_7_LATEST__HOME=/home/jenkins/tools/java/latest1.7 Recording fingerprints Setting JDK_1_7_LATEST__HOME=/home/jenkins/tools/java/latest1.7 Recording test results Setting JDK_1_7_LATEST__HOME=/home/jenkins/tools/java/latest1.7 ERROR: Step ?Publish JUnit test result report? failed: No test report files were found. Configuration error? Publishing Javadoc Setting JDK_1_7_LATEST__HOME=/home/jenkins/tools/java/latest1.7 Setting JDK_1_7_LATEST__HOME=/home/jenkins/tools/java/latest1.7 Email was triggered for: Failure - Any Sending email for trigger: Failure - Any Setting JDK_1_7_LATEST__HOME=/home/jenkins/tools/java/latest1.7 Setting JDK_1_7_LATEST__HOME=/home/jenkins/tools/java/latest1.7 ################################################################################### ############################## FAILED TESTS (if any) ############################## No tests ran.