http://download.jboss.org/jbosstools/updates/nightly/luna/ says last folder published is B14 but http://download.jboss.org/jbosstools/updates/nightly/luna/compositeArtifacts.xml contains the following:

{{{
<?compositeArtifactRepository version='1.0.0'?><repository name="JBoss Tools Builds - builds/nightly/core/4.2.luna" type="org.eclipse.equinox.internal.p2.artifact.repository.CompositeArtifactRepository" version="1.0.0"><properties size="2"><property name="p2.timestamp" value="1417970049000"/><property name="p2.compressed" value="true"/></properties><children size="9">
<child location="2014-12-06_19-43-15-B315/all/repo/"/>
<child location="2014-12-06_01-42-39-B314/all/repo/"/>
<child location="2014-12-05_16-52-33-B313/all/repo/"/><child location="2014-12-05_13-48-06-B312/all/repo/"/><child location="2014-12-04_19-55-14-B311/all/repo/"/><child location="2014-12-04_14-48-07-B310/all/repo/"/><child location="2014-12-03_17-44-02-B309/all/repo/"/><child location="2014-12-02_13-44-05-B308/all/repo/"/><child location="2014-12-01_16-57-02-B307/all/repo/"/></children></repository>
}}}

Indicating that http://download.jboss.org/jbosstools/updates/nightly/luna/2014-12-06_19-43-15-B315/all/repo/ should exist - but it does not.

I assume this is due to a nightly being used for publishing results to staging - thus it might just be cleanup step that is missing ?