hook failed: "no de-lock-fallback-relation-changed"

[juditnovak]

Steps to reproduce

Shut down and resart the server hosting the Juju model. Opensearch units will be blocked on net.ipv4.tcp_retries2 should be 5 Destroy a unit and add a new one. The new one will have this issue (see attached screenshots)

Expected behavior

Model running smooth.

Actual behavior

Traceback (most recent call last):
  File "/var/lib/juju/agents/unit-opensearch-2/charm/./src/charm.py", line 267, in <module>
    main(OpenSearchOperatorCharm)
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/main.py", line 544, in main
    manager.run()
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/main.py", line 520, in run
    self._emit()
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/main.py", line 509, in _emit
    _emit_charm_event(self.charm, self.dispatcher.event_name)
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/main.py", line 143, in _emit_charm_event
    event_to_emit.emit(*args, **kwargs)
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/framework.py", line 350, in emit
    framework._emit(event)
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/framework.py", line 849, in _emit
    self._reemit(event_path)
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/framework.py", line 939, in _reemit
    custom_handler(event)
  File "/var/lib/juju/agents/unit-opensearch-2/charm/lib/charms/opensearch/v0/opensearch_locking.py", line 164, in _on_peer_relation_changed
    if self._unit_with_lock and self._unit_requested_lock(
  File "/var/lib/juju/agents/unit-opensearch-2/charm/lib/charms/opensearch/v0/opensearch_locking.py", line 103, in _unit_requested_lock
    value = self._relation.data[unit].get("lock-requested")
  File "/var/lib/juju/agents/unit-opensearch-2/charm/venv/ops/model.py", line 1582, in __getitem__
    return self._data[key]
KeyError: <ops.model.Unit opensearch/0>

Versions

Operating system:

Juju CLI: 3.1.8-genericlinux-amd64

Juju agent: installed: 3.1.8 (26977) 95MB -

Charm revision: installed: 2.14.0 (51) 935MB held

LXD: 5.0.3

Log output

Juju debug log:

Additional context

[github-actions[bot]]

https://warthogs.atlassian.net/browse/DPE-4564