/usr/share/java/solr-dataimporthandler.jar is in libsolr-java 3.6.2+dfsg-10+deb9u2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/solr-dataimporthandler-3.6.2.jar
/usr/share/java/solr-dataimporthandler-3.6.2.jar