[JENKINS] Solr-reference-guide-master - Build # 23887 - Failure

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

Build: https://builds.apache.org/job/Solr-reference-guide-master/23887/

Log: 
Started by timer
Running as SYSTEM
[EnvInject] - Loading node environment variables.
Building remotely on websites (git-websites svn-websites) in workspace /home/jenkins/jenkins-slave/workspace/Solr-reference-guide-master
No credentials specified
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > 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
Resetting working tree
 > git reset --hard # timeout=10
 > git clean -fdx # 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 rev-parse refs/remotes/origin/master^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/master^{commit} # timeout=10
Checking out Revision 4eb755db18f6a605bf62e1c8f029093ad8d6ca7b (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 4eb755db18f6a605bf62e1c8f029093ad8d6ca7b
Commit message: "SOLR-12690: Regularize LoggerFactory declarations. Fixing an incorrect change"
 > git rev-list --no-walk 4eb755db18f6a605bf62e1c8f029093ad8d6ca7b # timeout=10
No emails were triggered.
[Solr-reference-guide-master] $ /bin/bash -xe /tmp/jenkins17265716125027251777.sh
+ bash dev-tools/scripts/jenkins.build.ref.guide.sh
+ set -e
+ RVM_PATH=/home/jenkins/.rvm
+ RUBY_VERSION=ruby-2.5.1
+ GEMSET=solr-refguide-gemset
+ curl -sSL https://get.rvm.io
+ bash -s -- --ignore-dotfiles stable
bash: line 1: 500:: command not found
Build step 'Execute shell' marked build as failure
Publishing Javadoc
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any