Build failed in Jenkins: spring-extensions-v5-nightly #1540

[Shibboleth Jenkins]

See <http://127.0.0.1:1583/jenkins/job/spring-extensions-v5-nightly/1540/display/redirect>

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Started by upstream project "java-support-v7-nightly" build number 1540
originally caused by:
 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/spring-extensions-v5-nightly/ws/>
No credentials specified
Cloning the remote Git repository
Cloning repository git://git.shibboleth.net/spring-extensions
 > git init <http://127.0.0.1:1583/jenkins/job/spring-extensions-v5-nightly/ws/> # timeout=10
Fetching upstream changes from git://git.shibboleth.net/spring-extensions
 > git --version # timeout=10
 > git fetch --tags --progress git://git.shibboleth.net/spring-extensions +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url git://git.shibboleth.net/spring-extensions # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url git://git.shibboleth.net/spring-extensions # timeout=10
Fetching upstream changes from git://git.shibboleth.net/spring-extensions
 > git fetch --tags --progress git://git.shibboleth.net/spring-extensions +refs/heads/*:refs/remotes/origin/*
 > git rev-parse refs/remotes/origin/maint-5^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/maint-5^{commit} # timeout=10
Checking out Revision c9b1a6e829568b6f45897ba145166e851ff49c10 (refs/remotes/origin/maint-5)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f c9b1a6e829568b6f45897ba145166e851ff49c10
Commit message: "Bump version after release"
 > git rev-list --no-walk c9b1a6e829568b6f45897ba145166e851ff49c10 # 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.