Build failed in Hudson: Archetype #2

[Hudson]

See http://ci.sonatype.org/job/Archetype/2/changes

------------------------------------------
started
Updating https://svn.apache.org/repos/asf/maven/artifact/trunk
ERROR: Failed to update https://svn.apache.org/repos/asf/maven/artifact/trunk
org.tmatesoft.svn.core.SVNException: svn: Working copy 
'http://ci.sonatype.org/job/Archetype/ws/maven-artifact'  locked; try 
performing 'cleanup'
        at 
org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:49)
        at 
org.tmatesoft.svn.core.internal.wc.admin.SVNAdminArea14.lock(SVNAdminArea14.java:1370)
        at 
org.tmatesoft.svn.core.internal.wc.admin.SVNWCAccess.doOpen(SVNWCAccess.java:348)
        at 
org.tmatesoft.svn.core.internal.wc.admin.SVNWCAccess.open(SVNWCAccess.java:261)
        at 
org.tmatesoft.svn.core.internal.wc.admin.SVNWCAccess.openAnchor(SVNWCAccess.java:153)
        at 
org.tmatesoft.svn.core.wc.SVNUpdateClient.doUpdate(SVNUpdateClient.java:145)
        at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:381)
        at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:353)
        at hudson.FilePath.act(FilePath.java:301)
        at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:347)
        at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:300)
        at hudson.model.AbstractProject.checkout(AbstractProject.java:564)
        at 
hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:228)
        at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:191)
        at hudson.model.Run.run(Run.java:659)
        at hudson.model.Build.run(Build.java:101)
        at hudson.model.ResourceController.execute(ResourceController.java:70)
        at hudson.model.Executor.run(Executor.java:71)