The out runner process shutdown with the following error. Any clue?
May 16 17:32:12 2019 (31602) Uncaught runner exception: (pymysql.err.InternalError) (1053, 'Server shutdown in progress') [SQL: 'SELECT anon_1.member_id AS anon_1_member_id, anon_1.member__member_id AS anon_1_member__member_id, anon_1.member_role AS anon_1_member_role, anon_1.member_list_id AS anon_1_member_list_id, anon_1.member_moderation_action AS anon_1_member_moderation_action, anon_1.member_address_id AS anon_1_member_address_id, anon_1.member_preferences_id AS anon_1_member_preferences_id, anon_1.member_user_id AS anon_1_member_user_id \nFROM (SELECT member.id AS member_id, member._member_id AS member__member_id, member.role AS member_role, member.list_id AS member_list_id, member.moderation_action AS member_moderation_action, member.address_id AS member_address_id, member.preferences_id AS member_preferences_id, member.user_id AS member_user_id \nFROM member, address \nWHERE member.list_id = %(list_id_1)s AND member.role = %(role_1)s AND address.email = %(email_1)s AND member.address_id = address.id UNION SELECT member.id AS member_id, member._member_id AS member__member_id, member.role AS member_role, member.list_id AS member_list_id, member.moderation_action AS member_moderation_action, member.address_id AS member_address_id, member.preferences_id AS member_preferences_id, member.user_id AS member_user_id \nFROM member, address, user \nWHERE member.list_id = %(list_id_2)s AND member.role = %(role_2)s AND address.email = %(email_2)s AND member.user_id = user.id AND user._preferred_address_id = address.id) AS anon_1'] [parameters: {'list_id_1': 'listname.list.company.domain', 'role_1': 1, 'email_1': 'usera@company.domain', 'list_id_2': 'listname.list.company.domain', 'role_2': 1, 'email_2': 'usera@company.domain'}] (Background on this error at: http://sqlalche.me/e/2j85)
File "/usr/local/lib/python3.6/site-packages/mailman/core/runner.py", line 173, in _one_iteration
File "/usr/local/lib/python3.6/site-packages/mailman/core/runner.py", line 266, in _process_one_file
File "/usr/local/lib/python3.6/site-packages/mailman/runners/outgoing.py", line 93, in _dispose