YEP,
same problem for us & same workaround :
service vco-server stop
rm -rf /var/log/vco/app-server/scripting.log_lucene
rm -rf /var/log/vco/app-server/scripting.log_lucene.1 (if exist)
rm -rf /var/log/vco/app-server/scripting.log_lucene.2 (if exist)
rm -rf /var/log/vco/app-server/scripting.log_lucene.3 (if exist)
rm -rf /var/log/vco/app-server/scripting.log_lucene.4 (if exist)
rm -rf /var/log/vco/app-server/scripting.log_lucene.5 (if exist)
service vco-server start
thx for your help @