buildbot failure in on ofbizBranch18Framework

[buildbot]

The Buildbot has detected a new failure on builder ofbizBranch18Framework while building ofbiz-framework. Full details are available at:
    https://ci.apache.org/builders/ofbizBranch18Framework/builds/421

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

Buildslave for this Build: asf947_ubuntu

Build Reason: The AnyBranchScheduler scheduler named 'onBranch18FrameworkCommit' triggered this build
Build Source Stamp: [branch release18.12] b159dffb15c36daa2d3d1f3a622734c681a0c21e
Blamelist: Jacques Le Roux <[hidden email]>

BUILD FAILED: failed shell_2

Sincerely,
 -The Buildbot