It looks that during transaction recovery the java -jar jboss-modules.jar ... is executed. With galleon slim server the module.xml files are referencing artifacts so we need it to point it to

-Djboss.modules.settings.xml.url=file:///opt/jboss/container/wildfly/s2i/galleon/settings.xml

to be able to load modules.

Probable place to fix https://github.com/wildfly/temp-eap-modules/blob/EAP7-1216/os-eap-txnrecovery/bash/added/partitionPV.sh#L455

The other occurences of java cmd execution in /opt/eap/bin seem to be already enhanced with settings.xml property.