buildbot failure in ASF Buildbot on oak-trunk-win7

[buildbot]

The Buildbot has detected a new failure on builder oak-trunk-win7 while 
building ASF Buildbot. Full details are available at:
    http://ci.apache.org/builders/oak-trunk-win7/builds/851

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

Buildslave for this Build: bb-win7

Build Reason: The AnyBranchScheduler scheduler named 'on-oak-commit' triggered 
this build
Build Source Stamp: [branch jackrabbit/oak/trunk] 1640723
Blamelist: chetanm

BUILD FAILED: failed compile

Sincerely,
 -The Buildbot