jbossts-narayana-skipTests build failure due to downloading some artifacts

Downloading: http://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-webdav-jackrabbit/2.2/wagon-webdav-jackrabbit-2.2.pom

[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR] The project org.jboss.as:jboss-as-parent:7.2.0.Alpha1-SNAPSHOT (C:\hudson\workspace\jbossts-narayana-skipTests\jboss-as\pom.xml) has 1 error
[ERROR] Unresolveable build extension: Plugin org.apache.maven.wagon:wagon-webdav-jackrabbit:2.2
or one of its dependencies could not be resolved: Failed to collect dependencies for
org.apache.maven.wagon:wagon-webdav-jackrabbit:jar:2.2 (): Failed to read artifact descriptor for
org.apache.maven.wagon:wagon-webdav-jackrabbit:jar:2.2: Could not transfer artifact org.apache.maven.wagon:wagon-webdav-jackrabbit:pom:2.2
from/to central (http://repo.maven.apache.org/maven2): Failed to transfer file: http://repo.maven.apache.org/maven2/org/apache/maven/wagon/wagon-webdav-jackrabbit/2.2/wagon-webdav-jackrabbit-2.2.pom.
Return code is: 502, ReasonPhrase:Bad Gateway. -> [Help 2]