/usr/share/maven-repo/org/apache/solr/ is in libsolr-java 3.6.2+dfsg-10+deb9u2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/org/apache/solr/solr-core/
/usr/share/maven-repo/org/apache/solr/solr-core/3.6.2/
/usr/share/maven-repo/org/apache/solr/solr-core/3.6.2/solr-core-3.6.2.jar
/usr/share/maven-repo/org/apache/solr/solr-core/3.6.2/solr-core-3.6.2.pom
/usr/share/maven-repo/org/apache/solr/solr-core/debian/
/usr/share/maven-repo/org/apache/solr/solr-core/debian/solr-core-debian.jar
/usr/share/maven-repo/org/apache/solr/solr-core/debian/solr-core-debian.pom
/usr/share/maven-repo/org/apache/solr/solr-dataimporthandler/
/usr/share/maven-repo/org/apache/solr/solr-dataimporthandler/3.6.2/
/usr/share/maven-repo/org/apache/solr/solr-dataimporthandler/3.6.2/solr-dataimporthandler-3.6.2.jar
/usr/share/maven-repo/org/apache/solr/solr-dataimporthandler/3.6.2/solr-dataimporthandler-3.6.2.pom
/usr/share/maven-repo/org/apache/solr/solr-dataimporthandler/debian/
/usr/share/maven-repo/org/apache/solr/solr-dataimporthandler/debian/solr-dataimporthandler-debian.jar
/usr/share/maven-repo/org/apache/solr/solr-dataimporthandler/debian/solr-dataimporthandler-debian.pom
/usr/share/maven-repo/org/apache/solr/solr-parent/
/usr/share/maven-repo/org/apache/solr/solr-parent/3.6.2/
/usr/share/maven-repo/org/apache/solr/solr-parent/3.6.2/solr-parent-3.6.2.pom
/usr/share/maven-repo/org/apache/solr/solr-parent/debian/
/usr/share/maven-repo/org/apache/solr/solr-parent/debian/solr-parent-debian.pom
/usr/share/maven-repo/org/apache/solr/solr-solrj/
/usr/share/maven-repo/org/apache/solr/solr-solrj/3.6.2/
/usr/share/maven-repo/org/apache/solr/solr-solrj/3.6.2/solr-solrj-3.6.2.jar
/usr/share/maven-repo/org/apache/solr/solr-solrj/3.6.2/solr-solrj-3.6.2.pom
/usr/share/maven-repo/org/apache/solr/solr-solrj/debian/
/usr/share/maven-repo/org/apache/solr/solr-solrj/debian/solr-solrj-debian.jar
/usr/share/maven-repo/org/apache/solr/solr-solrj/debian/solr-solrj-debian.pom