Build failed in Jenkins: java-opensaml2-nightly #4

[Shibboleth Jenkins]

See <https://build.shibboleth.net/jenkins/job/java-opensaml2-nightly/4/>

------------------------------------------
Started by upstream project "java-openws-nightly" build number 4
originally caused by:
 Started by upstream project "java-xmltooling-nightly" build number 4
 originally caused by:
  Started by upstream project "java-parent-project-v2-nightly" build number 4
  originally caused by:
   Started by upstream project "trigger-nightly-v2" build number 4
   originally caused by:
    Started by timer
Building in workspace <https://build.shibboleth.net/jenkins/job/java-opensaml2-nightly/ws/>
No JDK named ‘JDK-1.6.0’ found
Updating https://svn.shibboleth.net/java-opensaml2/branches/REL_2 at revision '2015-04-25T03:29:42.776 -0400'
At revision 1683
no change for https://svn.shibboleth.net/java-opensaml2/branches/REL_2 since the previous build
No JDK named ‘JDK-1.6.0’ found
[workspace] $ /opt/apache-maven-3.0.5/bin/mvn -Dmaven.repo.local=<https://build.shibboleth.net/jenkins/job/java-opensaml2-nightly/ws/.repository> clean -Prelease,central-disabled -U deploy site
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building OpenSAML-J 2.6.6-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for org.apache.maven.plugins:maven-jar-plugin:jar:2.3.2 is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.179s
[INFO] Finished at: Sat Apr 25 03:29:45 EDT 2015
[INFO] Final Memory: 10M/478M
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.apache.maven.plugins:maven-jar-plugin:2.3.2 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-jar-plugin:jar:2.3.2: Could not find artifact org.apache.maven.plugins:maven-jar-plugin:pom:2.3.2 -> [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
[CHECKSTYLE] Skipping publisher since build result is FAILURE
[htmlpublisher] Archiving HTML reports...
No JDK named ‘JDK-1.6.0’ found
[htmlpublisher] Archiving at PROJECT level <https://build.shibboleth.net/jenkins/job/java-opensaml2-nightly/ws/target/site> to /var/lib/jenkins/jobs/java-opensaml2-nightly/htmlreports/Site_Report
No JDK named ‘JDK-1.6.0’ found
ERROR: Specified HTML directory '<https://build.shibboleth.net/jenkins/job/java-opensaml2-nightly/ws/target/site'> does not exist.
Publishing Javadoc
No JDK named ‘JDK-1.6.0’ found
No JDK named ‘JDK-1.6.0’ found
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.
No JDK named ‘JDK-1.6.0’ found