buildbot exception in on ofbiz-trunk-framework

[buildbot]

The Buildbot has detected a build exception on builder ofbiz-trunk-framework while building . Full details are available at:
    https://ci.apache.org/builders/ofbiz-trunk-framework/builds/47

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

Buildslave for this Build: silvanus_ubuntu

Build Reason: forced: by IRC user <jleroux> (privmsg): forces manual build after INFRA-13643
Build Source Stamp: HEAD
Blamelist:

BUILD FAILED: exception shell upload_1

Sincerely,
 -The Buildbot