@mysterious-action-44812 has the logging code worked in non-pants contexts? if so, also no clue, but your MessageLogger code looks suspect on inspection given this: https://git-wip-us.apache.org/repos/asf?p=ant-ivy.git;a=blob;f=src/java/org/apache/ivy/util/Message.java;h=1e6b67f97bc8dfbc66abb3391281dd658320a8ee;hb=HEAD