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https://bugzilla.redhat.com/show_bug.cgi?id=640205
--- Comment #11 from Stanislav Ochotnicky sochotni@redhat.com 2010-10-07 10:35:21 EDT --- (In reply to comment #10)
visualvm.x86_64: E: zero-length /usr/lib64/visualvm/visualvm/config/Modules/org-netbeans-modules-options-keymap.xml_hidden ... visualvm.x86_64: E: zero-length /usr/lib64/visualvm/profiler/.lastModified -Upstream generates them and it is best not to delete them as upstream may rely on them for something.
visualvm.x86_64: W: hidden-file-or-dir /usr/lib64/visualvm/profiler/.lastModified -Added by upstream build.
Are they really needed? "Upstream may rely on them for something" is not the answer. If you can't figure out if these files are really needed, ask upstream. If there is no other way, remove these empty files and re-create them in post (remove in postun). Though I very much doubt it would harm anything if they were missing.
.lastModified files should be created in %post (removed in %postun). See http://bits.netbeans.org/dev/javadoc/org-netbeans-bootstrap/overview-summary...
As for the other zero-length files. I don't know their function, but unless we find a reason for them to stay they should be removed