buildbot exception in ASF Buildbot on ofbiz-trunk-ARM

[buildbot]

The Buildbot has detected a new failure on builder ofbiz-trunk-ARM while building ASF Buildbot.
Full details are available at:
 http://ci.apache.org/builders/ofbiz-trunk-ARM/builds/549

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

Buildslave for this Build: bb-cal-2_ubuntu_ARM

Build Reason: scheduler
Build Source Stamp: [branch ofbiz/trunk] 1523899
Blamelist: jacopoc

BUILD FAILED: exception upload

sincerely,
 -The Buildbot