buildbot exception in ASF Buildbot on serf-windows

[buildbot]

The Buildbot has detected a build exception on builder serf-windows while 
building ASF Buildbot. Full details are available at:
    http://ci.apache.org/builders/serf-windows/builds/308

Buildbot URL: http://ci.apache.org/

Buildslave for this Build: svn-w2k3-ra

Build Reason: The AnyBranchScheduler scheduler named 'on-serf-commit' triggered 
this build
Build Source Stamp: [branch serf/trunk] 1714116
Blamelist: rhuijben

BUILD FAILED: exception Cleanup

Sincerely,
 -The Buildbot