Build failed in Jenkins: Knox-0.5.1 #6

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

See <https://builds.apache.org/job/Knox-0.5.1/6/display/redirect>

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Started by an SCM change
[EnvInject] - Loading node environment variables.
Building remotely on ubuntu-1 (ubuntu trusty) in workspace <https://builds.apache.org/job/Knox-0.5.1/ws/>
Cloning the remote Git repository
Cloning repository https://git-wip-us.apache.org/repos/asf/knox.git
 > git init <https://builds.apache.org/job/Knox-0.5.1/ws/> # timeout=10
Fetching upstream changes from https://git-wip-us.apache.org/repos/asf/knox.git
 > git --version # timeout=10
 > git fetch --tags --progress https://git-wip-us.apache.org/repos/asf/knox.git +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url https://git-wip-us.apache.org/repos/asf/knox.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url https://git-wip-us.apache.org/repos/asf/knox.git # timeout=10
Fetching upstream changes from https://git-wip-us.apache.org/repos/asf/knox.git
 > git fetch --tags --progress https://git-wip-us.apache.org/repos/asf/knox.git +refs/heads/*:refs/remotes/origin/*
 > git rev-parse refs/remotes/origin/v0.5.1^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/v0.5.1^{commit} # timeout=10
Checking out Revision bbffb6612b4f68fce3ca4adc0033024fc967fe81 (refs/remotes/origin/v0.5.1)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f bbffb6612b4f68fce3ca4adc0033024fc967fe81
First time build. Skipping changelog.
 > git tag -a -f -m Jenkins Build #6 jenkins-Knox-0.5.1-6 # timeout=10
Parsing POMs
Established TCP socket on 47606
maven35-agent.jar already up to date
maven35-interceptor.jar already up to date
maven3-interceptor-commons.jar already up to date
[Knox-0.5.1] $ /home/jenkins/tools/java/latest1.6/bin/java -Xmx2g -Xms256m -cp /home/jenkins/jenkins-slave/maven35-agent.jar:/home/jenkins/tools/maven/latest/boot/plexus-classworlds-2.5.2.jar:/home/jenkins/tools/maven/latest/conf/logging jenkins.maven3.agent.Maven35Main /home/jenkins/tools/maven/latest/ /home/jenkins/jenkins-slave/slave.jar /home/jenkins/jenkins-slave/maven35-interceptor.jar /home/jenkins/jenkins-slave/maven3-interceptor-commons.jar 47606
Native maven support requires Java 1.7 or later, but this Maven is using /usr/local/asfpackages/java/jdk1.6.0_45-64/jre
Please use the freestyle project.
[Knox-0.5.1] $ ant post-build
Buildfile: <https://builds.apache.org/job/Knox-0.5.1/ws/build.xml>

_init:

_changes:
     [copy] Copying 1 file to <https://builds.apache.org/job/Knox-0.5.1/ws/target/0.5.1>

post-build:

BUILD SUCCESSFUL
Total time: 0 seconds
ERROR: Failed to launch Maven. Exit code = 1