Expire empty groups. Due to indentation changes, the code changes look more extensive than they are. In effect the if (group.size() > 0) test is moved to a narrower scope and the remove(group) is now performed if the group is empty. Document expire-groups-upon-completion. INT-2832 Doc Polishing PR Review + punctuation. INT-2833 Add Delay For Expiring Empty Groups minimumTimeoutForEmptyGroups