ZooKeeper-trunk-jdk7 - Build # 916 - Still Failing

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See https://builds.apache.org/job/ZooKeeper-trunk-jdk7/916/

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AU        docs/images/instruction_arrow.png
AU        docs/images/bk-overview.jpg
AU        docs/images/zookeeper_small.gif
AU        docs/images/zknamespace.jpg
AU        docs/images/2pc.jpg
AU        docs/images/zkservice.jpg
AU        docs/images/built-with-forrest-button.png
AU        docs/images/hadoop-logo.jpg
AU        docs/images/zkcomponents.jpg
AU        docs/images/zkperfRW-3.2.jpg
AU        docs/images/zkperfRW.jpg
AU        docs/images/zkperfreliability.jpg
A         docs/zookeeperObservers.pdf
AU        docs/zookeeperOver.pdf
A         docs/zookeeperQuotas.pdf
AU        docs/index.pdf
A         docs/bookkeeperConfig.html
A         docs/bookkeeperOverview.html
AU        docs/zookeeperOtherInfo.html
A         docs/bookkeeperConfig.pdf
AU        docs/zookeeperProgrammers.html
A         docs/bookkeeperStarted.pdf
AU        docs/zookeeperInternals.html
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At revision 1611735
No emails were triggered.
[locks-and-latches] Checking to see if we really have the locks
[locks-and-latches] Have all the locks, build can start
[trunk] $ ant -Dtest.output=yes -Dtest.junit.output.format=xml -Djavac.target=1.7 clean test-core-java
FATAL: command execution failed.Maybe you need to configure the job to choose one of your Ant installations?
java.io.IOException: Cannot run program "ant" (in directory "/home/jenkins/jenkins-slave/workspace/ZooKeeper-trunk-jdk7/trunk"): error=2, No such file or directory
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041)
	at hudson.Proc$LocalProc.<init>(Proc.java:244)
	at hudson.Proc$LocalProc.<init>(Proc.java:216)
	at hudson.Launcher$LocalLauncher.launch(Launcher.java:773)
	at hudson.Launcher$ProcStarter.start(Launcher.java:353)
	at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:998)
	at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:965)
	at hudson.remoting.UserRequest.perform(UserRequest.java:118)
	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
	at hudson.remoting.Request$2.run(Request.java:328)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: error=2, No such file or directory
	at java.lang.UNIXProcess.forkAndExec(Native Method)
	at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
	at java.lang.ProcessImpl.start(ProcessImpl.java:130)
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1022)
	... 14 more
Build step 'Invoke Ant' marked build as failure
[locks-and-latches] Releasing all the locks
[locks-and-latches] All the locks released
[WARNINGS] Skipping publisher since build result is FAILURE
Recording test results
Email was triggered for: Failure
Sending email for trigger: Failure



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############################## FAILED TESTS (if any) ##############################
No tests ran.