buildbot failure in ASF Buildbot on stratos-site-staging

[buildbot]

The Buildbot has detected a new failure on builder stratos-site-staging while 
building ASF Buildbot. Full details are available at:
    http://ci.apache.org/builders/stratos-site-staging/builds/4

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

Buildslave for this Build: bb-cms-slave

Build Reason: The AnyBranchScheduler scheduler named 'on-stratos-site-commit' 
triggered this build
Build Source Stamp: [branch stratos/site] 1718002
Blamelist: imesh

BUILD FAILED: failed compile

Sincerely,
 -The Buildbot