buildbot failure in on ofbiz-trunk-framework-plugins

[buildbot]

The Buildbot has detected a new failure on builder ofbiz-trunk-framework-plugins while building . Full details are available at:
    https://ci.apache.org/builders/ofbiz-trunk-framework-plugins/builds/150

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

Buildslave for this Build: silvanus_ubuntu

Build Reason: The AnyBranchScheduler scheduler named 'on-ofbiz-framework-commit' triggered this build
Build Source Stamp: [branch ofbiz/ofbiz-framework/trunk] 1798495
Blamelist: jleroux

BUILD FAILED: failed shell_4

Sincerely,
 -The Buildbot