Build failed in Jenkins: Log4j 2 2.x #3374

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

See <https://builds.apache.org/job/Log4j%202%202.x/3374/display/redirect>

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Started by user rgoers
[EnvInject] - Loading node environment variables.
Building remotely on H34 (ubuntu xenial) in workspace <https://builds.apache.org/job/Log4j%202%202.x/ws/>
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url https://git-wip-us.apache.org/repos/asf/logging-log4j2.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://git-wip-us.apache.org/repos/asf/logging-log4j2.git
 > git --version # timeout=10
 > git fetch --tags --progress https://git-wip-us.apache.org/repos/asf/logging-log4j2.git +refs/heads/*:refs/remotes/origin/*
 > git rev-parse refs/remotes/origin/release-2.x^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/release-2.x^{commit} # timeout=10
Checking out Revision 48387090f8302ec86550a14f5d52b0bfb7b4112c (refs/remotes/origin/release-2.x)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 48387090f8302ec86550a14f5d52b0bfb7b4112c
Commit message: "LOG4J2-2250 (configurable status logger timestamps) renamed property to use CamelCase after community feedback"
First time build. Skipping changelog.
[EnvInject] - Executing scripts and injecting environment variables after the SCM step.
[EnvInject] - Injecting as environment variables the properties content 
LANG=en_US.UTF-8

[EnvInject] - Variables injected successfully.
Parsing POMs
Modules changed, recalculating dependency graph
Established TCP socket on 32893
maven33-agent.jar already up to date
maven33-interceptor.jar already up to date
maven3-interceptor-commons.jar already up to date
[Log4j 2 2.x] $ /home/jenkins/tools/java/latest1.7/bin/java -Xmx2g -Xms256m -XX:MaxPermSize=256m -cp /home/jenkins/jenkins-slave/maven33-agent.jar:/home/jenkins/tools/maven/apache-maven-3.3.9/boot/plexus-classworlds-2.5.2.jar:/home/jenkins/tools/maven/apache-maven-3.3.9/conf/logging jenkins.maven3.agent.Maven33Main /home/jenkins/tools/maven/apache-maven-3.3.9 /home/jenkins/jenkins-slave/slave.jar /home/jenkins/jenkins-slave/maven33-interceptor.jar /home/jenkins/jenkins-slave/maven3-interceptor-commons.jar 32893
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$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:401)
	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
	at jenkins.maven3.agent.Maven33Main.main(Maven33Main.java:133)
	at jenkins.maven3.agent.Maven33Main.main(Maven33Main.java:64)
ERROR: Failed to parse POMs
java.io.EOFException: unexpected stream termination
	at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:408)
	at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:353)
	at hudson.slaves.Channels.forProcess(Channels.java:115)
	at hudson.maven.AbstractMavenProcessFactory.newProcess(AbstractMavenProcessFactory.java:294)
	at hudson.maven.ProcessCache.get(ProcessCache.java:236)
	at hudson.maven.MavenModuleSetBuild$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:429)

Jenkins build is back to normal : Log4j 2 2.x #3375

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See <https://builds.apache.org/job/Log4j%202%202.x/3375/display/redirect>