The LocalSocketImpl only has a JNI implementation in GNU Classpath, the version in libgcj should get a CNI implementation since it currently is just an empty override.
-- Summary: LocalSocketImpl not implemented Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libgcj AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mark at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27726