Build failed in Jenkins: java-parent-project-v8-nightly #509

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See <https://build.shibboleth.net/jenkins/job/java-parent-project-v8-nightly/509/display/redirect?page=changes>

Changes:

[Ian Young] Add a Javadoc API link for Apache HTTP components core

[Ian Young] JPAR-122 - NPE in maven-javadoc-plugin under Java 11

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Started by upstream project "trigger-nightly-v8" build number 509
originally caused by:
 Started by timer
Building on master in workspace <https://build.shibboleth.net/jenkins/job/java-parent-project-v8-nightly/ws/>
 > 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/*
 > git rev-parse refs/remotes/origin/master^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/master^{commit} # timeout=10
Checking out Revision ec93e0a3c8d321b0d60a5898ed9b2770b0115320 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f ec93e0a3c8d321b0d60a5898ed9b2770b0115320
Commit message: "JPAR-122 - NPE in maven-javadoc-plugin under Java 11"
 > git rev-list --no-walk 890b90ada67055dd8a44b1069d539bd6961a69e7 # timeout=10
[workspace] $ /opt/maven/bin/mvn -Dmaven.repo.local=<https://build.shibboleth.net/jenkins/job/java-parent-project-v8-nightly/ws/.repository> -B clean -Prelease,central-disabled -U deploy site
[INFO] Scanning for projects...
[WARNING] The project net.shibboleth:parent:pom:8.0.0-SNAPSHOT uses prerequisites which is only intended for maven-plugin projects but not for non maven-plugin projects. For such purposes you should use the maven-enforcer-plugin. See https://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html
[INFO] 
[INFO] -----------------------< net.shibboleth:parent >------------------------
[INFO] Building Shibboleth Project Java 8 Super POM 8.0.0-SNAPSHOT
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] Downloading from shib-release: https://build.shibboleth.net/nexus/content/groups/public/org/apache/maven/plugins/maven-javadoc-plugin/3.0.1/maven-javadoc-plugin-3.0.1.pom
[WARNING] The POM for org.apache.maven.plugins:maven-javadoc-plugin:jar:3.0.1 is missing, no dependency information available
[INFO] Downloading from shib-release: https://build.shibboleth.net/nexus/content/groups/public/org/apache/maven/plugins/maven-javadoc-plugin/3.0.1/maven-javadoc-plugin-3.0.1.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.783 s
[INFO] Finished at: 2019-01-24T20:00:57-05:00
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.apache.maven.plugins:maven-javadoc-plugin:3.0.1 or one of its dependencies could not be resolved: Could not find artifact org.apache.maven.plugins:maven-javadoc-plugin:jar:3.0.1 in shib-release (https://build.shibboleth.net/nexus/content/groups/public) -> [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
Build step 'Invoke top-level Maven targets' marked build as failure
[htmlpublisher] Archiving HTML reports...
[htmlpublisher] Archiving at PROJECT level <https://build.shibboleth.net/jenkins/job/java-parent-project-v8-nightly/ws/target/site> to /var/lib/jenkins/jobs/java-parent-project-v8-nightly/htmlreports/Site_20Report