[weld-builds] Build failed in Jenkins: Weld-2.x-docs #2263

[ci-builds at redhat.com]

See <http://jenkins.hosts.mwqe.eng.bos.redhat.com/hudson/job/Weld-2.x-docs/2263/>

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Started by timer
[EnvInject] - Loading node environment variables.
Building remotely on dsp01-rhel5_x86_64 (hwavirt mem2G mwqa_drives_services mem4G native-RHEL5-x86_64 nodejs RHEL5_x86_64_SW mwqa_test_ips general metamatrix brFF12 x86_64 native RHEL5_x86_64 linux RHEL-any RHEL5 selenium-ff3-rhel5-x86_64 linux-express-lane eap-sustaining selenium-ff3-rhel5 RHEL5_x86_64_res mwqa_drives_tools RHEL5_any non-vmware brFF3 RHEL brFF unix) in workspace <http://jenkins.hosts.mwqe.eng.bos.redhat.com/hudson/job/Weld-2.x-docs/ws/>
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url git://github.com/weld/core.git # timeout=10
Fetching upstream changes from git://github.com/weld/core.git
 > git --version # timeout=10
 > git -c core.askpass=true fetch --tags --progress git://github.com/weld/core.git +refs/heads/*:refs/remotes/origin/*
 > git rev-parse origin/2.4^{commit} # timeout=10
Checking out Revision 1fba586ec60685e619d77c8e786781b92dd255cd (origin/2.4)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 1fba586ec60685e619d77c8e786781b92dd255cd
 > git rev-list 1fba586ec60685e619d77c8e786781b92dd255cd # timeout=10
 > git tag -a -f -m Jenkins Build #2263 jenkins-Weld-2.x-docs-2263 # timeout=10
[Weld-2.x-docs] $ /qa/tools/opt/apache-maven-3.3.9/bin/mvn -f docs/reference/pom.xml clean install
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/maven/cli/MavenCli : Unsupported major.minor version 51.0
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
	at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	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:254)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
	at org.codehaus.plexus.classworlds.launcher.Launcher.getMainClass(Launcher.java:144)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:266)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Build step 'Invoke top-level Maven targets' marked build as failure
Archiving artifacts