Build failed in Jenkins: jetty9-dta-ssl-nightly #1537

[Shibboleth Jenkins]

See <http://127.0.0.1:1583/jenkins/job/jetty9-dta-ssl-nightly/1537/display/redirect>

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Started by upstream project "java-parent-project-v7-nightly" build number 1536
originally caused by:
 Started by upstream project "trigger-nightly-v7" build number 1532
 originally caused by:
  Started by timer
Running as SYSTEM
Building remotely on EC2 (RHEL8) - RHEL8 (i-007c6dae81f56183a) (aws-rhel8) in workspace <http://127.0.0.1:1583/jenkins/job/jetty9-dta-ssl-nightly/ws/>
No credentials specified
Cloning the remote Git repository
Cloning repository git://git.shibboleth.net/jetty9-dta-ssl
 > git init <http://127.0.0.1:1583/jenkins/job/jetty9-dta-ssl-nightly/ws/> # timeout=10
Fetching upstream changes from git://git.shibboleth.net/jetty9-dta-ssl
 > git --version # timeout=10
 > git fetch --tags --progress git://git.shibboleth.net/jetty9-dta-ssl +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url git://git.shibboleth.net/jetty9-dta-ssl # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url git://git.shibboleth.net/jetty9-dta-ssl # timeout=10
Fetching upstream changes from git://git.shibboleth.net/jetty9-dta-ssl
 > git fetch --tags --progress git://git.shibboleth.net/jetty9-dta-ssl +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 95137016655fa128976172f3da11082f091e2249 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 95137016655fa128976172f3da11082f091e2249
Commit message: "Fix Shibboleth Nexus repository locations"
 > git rev-list --no-walk 95137016655fa128976172f3da11082f091e2249 # timeout=10
FATAL: Couldn’t find any executable in /opt/maven
Build step 'Invoke top-level Maven targets' marked build as failure
Publishing Javadoc
TestNG Reports Processing: START
Looking for TestNG results report in workspace using pattern: **/target/surefire-reports/testng-results.xml
Did not find any matching files.