/usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/3.10.0/ecj-3.10.0.jar is in libecj-java 3.10.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/eclipse/jdt/core/compiler/ecj/3.10.0/../../../../../../../../java/eclipse-ecj-3.10.0.jar