Build failed in Jenkins: java-parent-project-v11-multi » OpenJDK-13,WindowsServer2012 #160

[Shibboleth Jenkins]

See <http://127.0.0.1:1583/jenkins/job/java-parent-project-v11-multi/jdk=OpenJDK-13,label=WindowsServer2012/160/display/redirect>

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Started by upstream project "java-parent-project-v11-multi" build number 160
originally caused by:
 Started by user Ian Young
Building remotely on WindowsServer2012 (windows) in workspace <http://127.0.0.1:1583/jenkins/job/java-parent-project-v11-multi/jdk=OpenJDK-13,label=WindowsServer2012/ws/>
No credentials specified
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url git://git.shibboleth.net/java-parent-project # timeout=10
Fetching upstream changes from git://git.shibboleth.net/java-parent-project
 > git --version # timeout=10
 > git fetch --tags --progress git://git.shibboleth.net/java-parent-project +refs/heads/*:refs/remotes/origin/*
Checking out Revision 98b26de8f14600ede083d45dfc3056268c6f6ed4 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 98b26de8f14600ede083d45dfc3056268c6f6ed4
Commit message: "Update mockito-core to 2.28.2"
 > git rev-list --no-walk 98b26de8f14600ede083d45dfc3056268c6f6ed4 # timeout=10
[WindowsServer2012] $ cmd.exe /C '""C:\Program Files\Apache\apache-maven-3.6.0\bin\mvn.cmd"' -version && exit %%ERRORLEVEL%%"
The JAVA_HOME environment variable is not defined correctly 
This environment variable is needed to run this program 
NB: JAVA_HOME should point to a JDK not a JRE 
Build step 'Invoke top-level Maven targets' marked build as failure
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.