As I mentioned in another thread, now slack will hide the comments before 90 days in the current apache-hbase.slack.com, which is really not good for finding useful discussions.
According to the documentation here https://infra.apache.org/slack.html We could invite people which do not have at apache dot org email address as a guest to the slack channel, so there is no concerns about only committers can join the channel. Thoughts? Thanks.
