Zstd-jni are java bindings for de-/compressing zstd archives. It is used for example by apache-commons-compress which currently has zstd support patched out.
Zstd is one of archive formats used by rpm. Some other java programs that handle rpms also require this library.
I had to unbundle bundled zstd-lib and rebundle the one present in Fedora. The library uses both java and native code.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=2088487