Build failed in Jenkins: commons-validator #55

[Apache Jenkins Server <je...@builds.apache.org>]

See <https://builds.apache.org/job/commons-validator/55/display/redirect>

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Started by user ggregory
[EnvInject] - Loading node environment variables.
Building remotely on ubuntu-1 (ubuntu trusty) in workspace <https://builds.apache.org/job/commons-validator/ws/>
Updating https://svn.apache.org/repos/asf/commons/proper/validator/trunk at revision '2018-01-08T15:39:33.914 +0000'
U         pom.xml
At revision 1820572

No changes for https://svn.apache.org/repos/asf/commons/proper/validator/trunk since the previous build
[EnvInject] - Executing scripts and injecting environment variables after the SCM step.
[EnvInject] - Injecting as environment variables the properties content 
JAVA_1_6_HOME=/home/jenkins/tools/java/latest1.6/

[EnvInject] - Variables injected successfully.
Parsing POMs
Downloaded artifact http://repo.maven.apache.org/maven2/org/apache/commons/commons-parent/43/commons-parent-43.pom
Modules changed, recalculating dependency graph
Established TCP socket on 41492
maven35-agent.jar already up to date
maven35-interceptor.jar already up to date
maven3-interceptor-commons.jar already up to date
[commons-validator] $ /home/jenkins/tools/java/latest1.7/bin/java -Xmx2g -Xms256m -cp /home/jenkins/jenkins-slave/maven35-agent.jar:/home/jenkins/tools/maven/apache-maven-3.5.2/boot/plexus-classworlds-2.5.2.jar:/home/jenkins/tools/maven/apache-maven-3.5.2/conf/logging jenkins.maven3.agent.Maven35Main /home/jenkins/tools/maven/apache-maven-3.5.2 /home/jenkins/jenkins-slave/slave.jar /home/jenkins/jenkins-slave/maven35-interceptor.jar /home/jenkins/jenkins-slave/maven3-interceptor-commons.jar 41492
Exception in thread "main" java.lang.UnsupportedClassVersionError: hudson/remoting/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$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:401)
	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
	at jenkins.maven3.agent.Maven35Main.main(Maven35Main.java:133)
	at jenkins.maven3.agent.Maven35Main.main(Maven35Main.java:64)
ERROR: Failed to parse POMs
java.io.EOFException: unexpected stream termination
	at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:408)
	at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:353)
	at hudson.slaves.Channels.forProcess(Channels.java:115)
	at hudson.maven.AbstractMavenProcessFactory.newProcess(AbstractMavenProcessFactory.java:294)
	at hudson.maven.ProcessCache.get(ProcessCache.java:236)
	at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:804)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
	at hudson.model.Run.execute(Run.java:1724)
	at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:543)
	at hudson.model.ResourceController.execute(ResourceController.java:97)
	at hudson.model.Executor.run(Executor.java:421)

Jenkins build is back to normal : commons-validator #56

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See <https://builds.apache.org/job/commons-validator/56/display/redirect>