UI upload leaves files in temporary directory after upload is complete

Components uploaded in the upload UI create temporary files under sonatype-work/nexus3/tmp. 

These files are not cleaned up until GC is run by the VM.

-rw-r--r--  1 username  staff  319913 Oct 26 11:43 upload_78f6e4b8_5d15_4e17_85a6_33de787709ea_00000011.tmp
-rw-r--r--  1 username  staff  4189874 Oct 26 11:44 upload_78f6e4b8_5d15_4e17_85a6_33de787709ea_00000028.tmp

So it would seem that these files are deleted in object finalizers? You can't count on finalizers running, so this can lead to orphaned temp files consuming disk space.

Expected:

The temporary files should be deleted as soon as the upload is completed.