Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/1188
> @justinleet: that's because we tar up the rc and just rename the tar.gz
file when it gets promoted. It's expected (and occurs on our previous
releases). To add onto that, I don't know what other projects actually do about
that (they may not, in which case we might want to modify what we do).
I can't think of projects that keep the `-rcN`. Just to be sure I checked
HBase, Phoenix, and Nifi and none of them seem to do it. We can fix it later
though.
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