buildbot failure in on ofbizBranch17Framework

[buildbot]

The Buildbot has detected a new failure on builder ofbizBranch17Framework while building . Full details are available at:
    https://ci.apache.org/builders/ofbizBranch17Framework/builds/302

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

Buildslave for this Build: silvanus_ubuntu

Build Reason: forced: by IRC user <jleroux> (privmsg): forces manual build to test gradle wrapper copy from tools
Build Source Stamp: HEAD
Blamelist:

BUILD FAILED: failed shell_4

Sincerely,
 -The Buildbot