Console Output

+ /var/lib/jenkins/tools/hudson.tasks.Maven_MavenInstallation/Maven_3.5.0/bin/mvn clean deploy -DoutFolder=/srv/www/appng.org/appng/builds/stable -Pmaven-central
[INFO] Scanning for projects...
Downloading: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-parent/1.21.0-SNAPSHOT/maven-metadata.xml
Progress (1): 614 B
                   
Downloaded: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-parent/1.21.0-SNAPSHOT/maven-metadata.xml (614 B at 1.1 kB/s)
Downloading: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-parent/1.21.0-SNAPSHOT/appng-application-parent-1.21.0-20200402.103647-49.pom
Progress (1): 4.1/6.2 kB
Progress (1): 6.2 kB    
                    
Downloaded: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-parent/1.21.0-SNAPSHOT/appng-application-parent-1.21.0-20200402.103647-49.pom (6.2 kB at 98 kB/s)
Downloading: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-bom/1.21.0-SNAPSHOT/maven-metadata.xml
Progress (1): 611 B
                   
Downloaded: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-bom/1.21.0-SNAPSHOT/maven-metadata.xml (611 B at 6.5 kB/s)
Downloading: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-bom/1.21.0-SNAPSHOT/appng-application-bom-1.21.0-20200402.103603-51.pom
Progress (1): 4.1/44 kB
Progress (1): 7.5/44 kB
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Progress (1): 16/44 kB
Progress (1): 16/44 kB
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Progress (1): 24/44 kB
Progress (1): 25/44 kB
Progress (1): 29/44 kB
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Progress (1): 33/44 kB
Progress (1): 37/44 kB
Progress (1): 40/44 kB
Progress (1): 41/44 kB
Progress (1): 44 kB   
                   
Downloaded: https://www.appng.org/nexus/repository/appng-snapshot/org/appng/appng-application-bom/1.21.0-SNAPSHOT/appng-application-bom-1.21.0-20200402.103603-51.pom (44 kB at 228 kB/s)
[INFO] Inspecting build with total of 1 modules...
[INFO] Installing Nexus Staging features:
[INFO]   ... total of 1 executions of maven-deploy-plugin replaced with nexus-staging-maven-plugin
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] Building appNG Authentication 1.13.0
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for org.appng:appng-maven-plugin:jar:1.21.0-SNAPSHOT is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.029 s
[INFO] Finished at: 2020-04-06T14:16:58+02:00
[INFO] Final Memory: 15M/246M
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.appng:appng-maven-plugin:1.21.0-SNAPSHOT or one of its dependencies could not be resolved: Could not find artifact org.appng:appng-maven-plugin:jar:1.21.0-SNAPSHOT -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException