Build failed in Jenkins: java-metadata-aggregator-0.10-nightly #1556

[Shibboleth Jenkins]

See <http://127.0.0.1:1583/jenkins/job/java-metadata-aggregator-0.10-nightly/1556/display/redirect>

------------------------------------------
Started by upstream project "spring-extensions-v6-nightly" build number 647
originally caused by:
 Started by upstream project "java-support-v8-nightly" build number 649
 originally caused by:
  Started by user Ian Young
Running as SYSTEM
Building remotely on EC2 (RHEL8) - RHEL8 (i-0bda90e6a27cb37ac) (aws-rhel8) in workspace <http://127.0.0.1:1583/jenkins/job/java-metadata-aggregator-0.10-nightly/ws/>
No credentials specified
Cloning the remote Git repository
Cloning repository git://git.shibboleth.net/java-metadata-aggregator
 > git init <http://127.0.0.1:1583/jenkins/job/java-metadata-aggregator-0.10-nightly/ws/> # timeout=10
Fetching upstream changes from git://git.shibboleth.net/java-metadata-aggregator
 > git --version # timeout=10
 > git fetch --tags --progress git://git.shibboleth.net/java-metadata-aggregator +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url git://git.shibboleth.net/java-metadata-aggregator # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url git://git.shibboleth.net/java-metadata-aggregator # timeout=10
Fetching upstream changes from git://git.shibboleth.net/java-metadata-aggregator
 > git fetch --tags --progress git://git.shibboleth.net/java-metadata-aggregator +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 7a1faf172854bb37daf71c862a9626fb02f58514 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 7a1faf172854bb37daf71c862a9626fb02f58514
Commit message: "Update reference to newly moved impl class."
 > git rev-list --no-walk 7a1faf172854bb37daf71c862a9626fb02f58514 # timeout=10
FATAL: Couldn’t find any executable in /opt/maven
Build step 'Invoke top-level Maven targets' marked build as failure