diff --git a/ariadne/manager/provisioning.py b/ariadne/manager/provisioning.py
index ec6835f..c202032 100644
--- a/ariadne/manager/provisioning.py
+++ b/ariadne/manager/provisioning.py
@@ -106,7 +106,13 @@ class ProvisioningManager:
                 continue
             candidates = self._storage.list_provision_candidates()
             for request in candidates:
-                self.provision_access_request(request.request_code)
+                try:
+                    self.provision_access_request(request.request_code)
+                except Exception:
+                    logger.exception(
+                        "provisioning loop error",
+                        extra={"event": "provision_loop_error", "request_code": request.request_code},
+                    )
             time.sleep(settings.provision_poll_interval_sec)
 
     def _sync_status_metrics(self) -> None:
@@ -168,6 +174,7 @@ class ProvisioningManager:
         self._log_provision_start(request_code)
 
         with self._db.connection() as conn:
+            conn.autocommit = True
             lock_id = _advisory_lock_id(request_code)
             locked_row = conn.execute("SELECT pg_try_advisory_lock(%s) AS locked", (lock_id,)).fetchone()
             if not locked_row or not locked_row.get("locked"):
@@ -175,7 +182,13 @@ class ProvisioningManager:
             try:
                 return self._provision_locked(conn, request_code, required_tasks)
             finally:
-                conn.execute("SELECT pg_advisory_unlock(%s)", (lock_id,))
+                try:
+                    conn.execute("SELECT pg_advisory_unlock(%s)", (lock_id,))
+                except Exception:
+                    logger.warning(
+                        "failed to release advisory lock",
+                        extra={"event": "provision_unlock_error", "request_code": request_code},
+                    )
 
     def _provision_locked(
         self,