If you re-load the jira you should see at the top this message...
Jira is in Temporary Lockdown mode as a spam countermeasure. Only
logged-in users with active roles (committer, contributor, PMC, etc.) will
be able to create issues or comments during this time. Lockdown period
from 11 May 2300 UTC to estimated 12 May 2300 UTC.
: Date: Wed, 11 May 2016 23:37:01 +0100
: From: Arcadius Ahouansou <firstname.lastname@example.org>
: Reply-To: email@example.com
: To: solr-user <firstname.lastname@example.org>
: Subject: Cannot comment on Jira anymore
: Somehow, I am no longer able to comment on Solr Jira tickets.
: When I go to https://issues.apache.org/jira/browse/SOLR-7963
: I am logged in... I can edit the ticket, but there is no comment box or
: comment button visible.
: Any help would be very appreciated.
: Thank you very much.
: Arcadius Ahouansou
: Menelic Ltd | Applied Knowledge Is Power
: M: 07908761999
: W: www.menelic.com