koji-gc can run for very long time now. If it is spawned by cron, it can happen that two processes will run in same time. Some locking could help here.
PR #1333
Metadata Update from @tkopecek: - Custom field Size adjusted to None - Issue set to the milestone: 1.21
Metadata Update from @jcupova: - Issue tagged with: testing-ready
Metadata Update from @jcupova: - Issue tagged with: testing-done
Commit 76caa2ef fixes this issue
Commit 608441aa fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/1332
Please continue any further discussion there.