Build failed in Jenkins: IvyDE-GithubPR #10

[Apache Jenkins Server]

See 
<https://builds.apache.org/job/IvyDE-GithubPR/10/display/redirect?page=changes>

Changes:

[g.grigelionis] Ivy 2.5.0 is available


------------------------------------------
GitHub pull request #9 to apache/ant-ivyde
Running as SYSTEM
[EnvInject] - Loading node environment variables.
Building remotely on H22 (ubuntu) in workspace 
<https://builds.apache.org/job/IvyDE-GithubPR/ws/>
No credentials specified
Cloning the remote Git repository
Cloning repository https://github.com/apache/ant-ivyde.git
 > git init <https://builds.apache.org/job/IvyDE-GithubPR/ws/> # timeout=10
Fetching upstream changes from https://github.com/apache/ant-ivyde.git
 > git --version # timeout=10
 > git fetch --tags --progress -- https://github.com/apache/ant-ivyde.git 
 > +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url https://github.com/apache/ant-ivyde.git # 
 > timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # 
 > timeout=10
 > git config remote.origin.url https://github.com/apache/ant-ivyde.git # 
 > timeout=10
Cleaning workspace
 > git rev-parse --verify HEAD # timeout=10
No valid HEAD. Skipping the resetting
 > git clean -fdx # timeout=10
Fetching upstream changes from https://github.com/apache/ant-ivyde.git
 > git fetch --tags --progress -- https://github.com/apache/ant-ivyde.git 
 > +refs/heads/*:refs/remotes/origin/*
 > git config core.sparsecheckout # timeout=10
 > git checkout -f origin/master
 > git branch -a -v --no-abbrev # timeout=10
 > git checkout -b master origin/master
  Opening connection
    Done: 0
  Counting objects
    Done: 2033
  Finding sources
    Done: 2033
  Getting sizes
    Done: 871
  Compressing objects
    Done: 1415241
  Writing objects
    Done: 2033
  remote: Resolving deltas
  remote: Updating references
Merging refs/tags/changes/10
 > git rev-parse refs/tags/changes/10^{commit} # timeout=10
 > git merge 7908a8f452836a2afec4270d39dd1c5d85b205df # timeout=10
 > git rev-parse master^{commit} # timeout=10
Checking out Revision 8bc601b11b4d90f0e40a5b5facc4d1f673498469 (master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 8bc601b11b4d90f0e40a5b5facc4d1f673498469
Commit message: "Merge commit '7908a8f452836a2afec4270d39dd1c5d85b205df'"
 > git rev-parse origin/master^{commit} # timeout=10
 > git rev-list --no-walk 5c6f90c864a786addd1c61115720d136d4d4c70b # timeout=10
[locks-and-latches] Checking to see if we really have the locks
[locks-and-latches] Have all the locks, build can start
Copied 1 artifact from "Ivy" build number 829
[IvyDE-GithubPR] $ ant clean jenkins-prepare
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)
Build step 'Invoke Ant' marked build as failure
[locks-and-latches] Releasing all the locks
[locks-and-latches] All the locks released
Archiving artifacts