To reduce e-mail traffic to dev@arrow.apache.org, we've changed the JIRA notification schema to only send issues CREATION e-mails to this mailing list.
All issue creation and comments/updates to JIRAs will be sent to iss...@arrow.apache.org. So I recommend subscribing (issues-subscr...@arrow.apache.org) to this mailing list to keep receiving all the updates (and possibly setting up a separate mail filter). You can also "watch" specific issues on JIRA to subscribe to all notifications. Please let us know if there's any questions. Thanks! Wes