[JENKINS] Solr-reference-guide-8.1 - Build # 134 - Failure

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

Build: https://builds.apache.org/job/Solr-reference-guide-8.1/134/

Log: 
Started by timer
[EnvInject] - Loading node environment variables.
Building remotely on websites2 (git-websites svn-websites) in workspace /home/jenkins/jenkins-slave/workspace/Solr-reference-guide-8.1
No credentials specified
Cloning the remote Git repository
Cloning repository https://gitbox.apache.org/repos/asf/lucene-solr.git
 > git init /home/jenkins/jenkins-slave/workspace/Solr-reference-guide-8.1 # timeout=10
Fetching upstream changes from https://gitbox.apache.org/repos/asf/lucene-solr.git
 > git --version # timeout=10
 > git fetch --tags --progress https://gitbox.apache.org/repos/asf/lucene-solr.git +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url https://gitbox.apache.org/repos/asf/lucene-solr.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url https://gitbox.apache.org/repos/asf/lucene-solr.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://gitbox.apache.org/repos/asf/lucene-solr.git
 > git fetch --tags --progress https://gitbox.apache.org/repos/asf/lucene-solr.git +refs/heads/*:refs/remotes/origin/*
 > git rev-parse refs/remotes/origin/branch_8_1^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/branch_8_1^{commit} # timeout=10
Checking out Revision 97c9831f2b8e3d5b1f2292c0aade52f67c3545f6 (refs/remotes/origin/branch_8_1)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 97c9831f2b8e3d5b1f2292c0aade52f67c3545f6
Commit message: "Fix duplicate line after merge conflict."
 > git rev-list --no-walk 3fa1997ede83ebb251a3de6e58d4f8613624bf4f # timeout=10
No emails were triggered.
[Solr-reference-guide-8.1] $ /bin/bash -xe /tmp/jenkins3855499314641670263.sh
+ bash dev-tools/scripts/jenkins.build.ref.guide.sh
+ set -e
+ RVM_PATH=/home/jenkins/.rvm
+ RUBY_VERSION=ruby-2.3.3
+ GEMSET=solr-refguide-gemset
+ curl -sSL https://get.rvm.io
+ bash -s -- --ignore-dotfiles stable
Turning on ignore dotfiles mode.
Downloading https://github.com/rvm/rvm/archive/1.29.8.tar.gz
Downloading https://github.com/rvm/rvm/releases/download/1.29.8/1.29.8.tar.gz.asc
gpg: Signature made Wed 08 May 2019 02:14:49 PM UTC
gpg:                using RSA key 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
gpg: Can't check signature: No public key
GPG signature verification failed for '/home/jenkins/.rvm/archives/rvm-1.29.8.tgz' - 'https://github.com/rvm/rvm/releases/download/1.29.8/1.29.8.tar.gz.asc'! Try to install GPG v2 and then fetch the public key:

    gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

or if it fails:

    command curl -sSL https://rvm.io/mpapis.asc | gpg --import -
    command curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -

In case of further problems with validation please refer to https://rvm.io/rvm/security

Build step 'Execute shell' marked build as failure
Archiving artifacts
Publishing Javadoc
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any