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fix: [DPE-7704] avoid break on empty peers #676

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fix: [DPE-7704] avoid break on empty peers #676

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8 changes: 6 additions & 2 deletions lib/charms/mysql/v0/mysql.py
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,7 @@ def wait_until_mysql_connection(self) -> None:
# Increment this major API version when introducing breaking changes
LIBAPI = 0

LIBPATCH = 92
LIBPATCH = 93

UNIT_TEARDOWN_LOCKNAME = "unit-teardown"
UNIT_ADD_LOCKNAME = "unit-add"
Expand Down Expand Up @@ -874,7 +874,11 @@ def get_cluster_endpoints(self, relation_name: str) -> tuple[str, str, str]:
if v["status"] == MySQLMemberState.RECOVERING:
continue

address = f"{self.get_unit_address(unit_labels[k], relation_name)}:3306"
# skip if unit not available in unit_labels
if unit_label := unit_labels.get(k):
address = f"{self.get_unit_address(unit_label, relation_name)}:3306"
else:
continue

if v["status"] != MySQLMemberState.ONLINE:
no_endpoints.add(address)
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