It looks like reviewer-bot is no longer adding reviewers to new changes because of the SSH key for gerrit having changed. From the logs:
Wed 05 Aug 2026 01:35:03 PM UTC: Running as task gerrit-reviewer-bot-29765615-8r4wf
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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ED25519 key sent by the remote host is
SHA256:njCmWMsshq3MqQxyIFO36UNwCwzTamXERqylF1XJhd8.
Please contact your system administrator.
Add correct host key in /data/project/gerrit-reviewer-bot/.ssh/known_hosts to get rid of this message.
Offending RSA key in /data/project/gerrit-reviewer-bot/.ssh/known_hosts:1
remove with:
ssh-keygen -f "/data/project/gerrit-reviewer-bot/.ssh/known_hosts" -R "[gerrit.wikimedia.org]:29418"
ED25519 host key for [gerrit.wikimedia.org]:29418 has changed and you have requested strict checking.
Host key verification failed.
Traceback (most recent call last):
File "/data/project/gerrit-reviewer-bot/src/gerrit-reviewer-bot/pop3bot.py", line 122, in main
add_reviewers(changeset['id'], reviewers)
File "/data/project/gerrit-reviewer-bot/src/gerrit-reviewer-bot/add_reviewer.py", line 150, in add_reviewers
raise Exception(command + ' was not executed successfully (code %i)' % retval)
Exception: gerrit set-reviewers --add ejegg --add XenoRyet --add jgleeson --add Eileen --add cstone --add damilare --add Wfan --add lsandergreen --add dmiranda 'wikimedia%2Ffundraising%2Fcrm~1321027' was not executed successfully (code 255)
{'id': 'wikimedia%2Ffundraising%2Fcrm~1321027', 'triplet_id': 'wikimedia%2Ffundraising%2Fcrm~master~I130988081a57793a2bed368900ef62d745359ab1', 'project': 'wikimedia/fundraising/crm', 'branch': 'master', 'hashtags': [], 'change_id': 'I130988081a57793a2bed368900ef62d745359ab1', 'subject': 'Update date_of_largest_donation for donors whose largest is endowment.', 'status': 'NEW', 'created': '2026-08-04 17:27:47.000000000', 'updated': '2026-08-04 23:50:47.000000000', 'submit_type': 'REBASE_IF_NECESSARY', 'mergeable': True, 'insertions': 34, 'deletions': 0, 'total_comment_count': 0, 'unresolved_comment_count': 0, 'has_review_started': True, 'meta_rev_id': 'b4ab08efbb40a6353de53beb6bef0ced6d999e8e', '_number': 1321027, 'virtual_id_number': 1321027, 'owner': {'_account_id': 12685, 'name': 'Lars SG', 'display_name': 'lsandergreen', 'email': 'lsandergreen@wikimedia.org', 'username': 'lsandergreen'}, 'current_revision_number': 2, 'current_revision': '85f9874ee5559c8c60858e5db72e2289f8b688d0', 'revisions': {'85f9874ee5559c8c60858e5db72e2289f8b688d0': {'kind': 'NO_CODE_CHANGE', '_number': 2, 'created': '2026-08-04 23:25:56.000000000', 'uploader': {'_account_id': 12685, 'name': 'Lars SG', 'display_name': 'lsandergreen', 'email': 'lsandergreen@wikimedia.org', 'username': 'lsandergreen'}, 'ref': 'refs/changes/27/1321027/2', 'fetch': {'anonymous http': {'url': 'https://gerrit.wikimedia.org/r/wikimedia/fundraising/crm', 'ref': 'refs/changes/27/1321027/2'}}, 'branch': 'refs/heads/master', 'files': {'ext/wmf-civicrm/CRM/Wmf/Upgrader.php': {'old_mode': 33188, 'new_mode': 33188, 'lines_inserted': 34, 'size_delta': 1138, 'size': 186849}}, 'description': 'Edit commit message'}}, 'requirements': [], 'submit_records': [{'rule_name': 'gerrit~DefaultSubmitRule', 'status': 'NOT_READY', 'labels': [{'label': 'Verified', 'status': 'OK', 'applied_by': {'_account_id': 75, 'name': 'jenkins-bot', 'username': 'jenkins-bot', 'tags': ['SERVICE_USER']}}, {'label': 'Code-Review', 'status': 'NEED'}]}]}
caused exception:Traceback (most recent call last):
File "/data/project/gerrit-reviewer-bot/src/gerrit-reviewer-bot/pop3bot.py", line 134, in
main()
File "/data/project/gerrit-reviewer-bot/src/gerrit-reviewer-bot/pop3bot.py", line 122, in main
add_reviewers(changeset['id'], reviewers)
File "/data/project/gerrit-reviewer-bot/src/gerrit-reviewer-bot/add_reviewer.py", line 150, in add_reviewers
raise Exception(command + ' was not executed successfully (code %i)' % retval)
Exception: gerrit set-reviewers --add ejegg --add XenoRyet --add jgleeson --add Eileen --add cstone --add damilare --add Wfan --add lsandergreen --add dmiranda 'wikimedia%2Ffundraising%2Fcrm~1321027' was not executed successfully (code 255)