[JENKINS] Lucene » Solr-reference-guide-8.x - Build # 103 - Failure!

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Build: https://ci-builds.apache.org/job/Lucene/job/Solr-reference-guide-8.x/103/

Log: 
Started by an SCM change
Started by an SCM change
Running as SYSTEM
[EnvInject] - Loading node environment variables.
Building remotely on websites1 (git-websites svn-websites) in workspace /home/jenkins/712657a4/workspace/Lucene/Solr-reference-guide-8.x
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/* # timeout=10
 > git rev-parse refs/remotes/origin/branch_8x^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/branch_8x^{commit} # timeout=10
Checking out Revision 3aca98fba04c5eb23ccd05b78494ccfcdd3ddb03 (refs/remotes/origin/branch_8x)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 3aca98fba04c5eb23ccd05b78494ccfcdd3ddb03 # timeout=10
Commit message: "Correct EOL at the end of sha for junit, branch_8x (#2001)"
 > git rev-list --no-walk 4e68b4313af3619279a19d97cd380903b0e8f037 # timeout=10
No emails were triggered.
ERROR: no such tool ‘Ant 1.8.4’
SSH: Current build result is [FAILURE], not going to run.
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any