/usr/share/maven-repo/io/netty/netty-handler/ is in libnetty-java 1:4.1.7-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/io/netty/netty-handler-proxy/4.1.7.Final/
/usr/share/maven-repo/io/netty/netty-handler-proxy/4.1.7.Final/netty-handler-proxy-4.1.7.Final.jar
/usr/share/maven-repo/io/netty/netty-handler-proxy/4.1.7.Final/netty-handler-proxy-4.1.7.Final.pom
/usr/share/maven-repo/io/netty/netty-handler-proxy/debian/
/usr/share/maven-repo/io/netty/netty-handler-proxy/debian/netty-handler-proxy-debian.jar
/usr/share/maven-repo/io/netty/netty-handler-proxy/debian/netty-handler-proxy-debian.pom
/usr/share/maven-repo/io/netty/netty-handler/4.1.7.Final/
/usr/share/maven-repo/io/netty/netty-handler/4.1.7.Final/netty-handler-4.1.7.Final.jar
/usr/share/maven-repo/io/netty/netty-handler/4.1.7.Final/netty-handler-4.1.7.Final.pom
/usr/share/maven-repo/io/netty/netty-handler/debian/
/usr/share/maven-repo/io/netty/netty-handler/debian/netty-handler-debian.jar
/usr/share/maven-repo/io/netty/netty-handler/debian/netty-handler-debian.pom