MINOR: Improve UC lineage exception handling (#23081)

(cherry picked from commit 7a6d5cd2fb483705b6e583f032fb24050196aab7)

ingestion/src/metadata/ingestion/lineage/sql_lineage.py

@@ -63,9 +63,16 @@ def get_column_fqn(table_entity: Table, column: str) -> Optional[str]:
     """
     if not table_entity:
         return None
-    for tbl_column in table_entity.columns:
+    for tbl_column in table_entity.columns or []:
+        try:
             if column.lower() == tbl_column.name.root.lower():
                 return tbl_column.fullyQualifiedName.root
+        except Exception as e:
+            logger.debug(traceback.format_exc())
+            logger.debug(
+                f"Error getting column FQN for column [{column}] in"
+                f"table [{table_entity.fullyQualifiedName}] for column [{tbl_column}]: {e}"
+            )
 
     return None
 

ingestion/src/metadata/ingestion/source/database/unitycatalog/lineage.py

@@ -93,6 +93,7 @@ class UnitycatalogLineageSource(Source):
     def _get_lineage_details(
         self, from_table: Table, to_table: Table, databricks_table_fqn: str
     ) -> Optional[LineageDetails]:
+        try:
             col_lineage = []
             for column in to_table.columns:
                 column_streams = self.client.get_column_lineage(
@@ -116,6 +117,12 @@ class UnitycatalogLineageSource(Source):
                     columnsLineage=col_lineage, source=LineageSource.QueryLineage
                 )
             return None
+        except Exception as exc:
+            logger.debug(
+                f"Error computing column lineage for {to_table.fullyQualifiedName.root} - {exc}"
+            )
+            logger.debug(traceback.format_exc())
+            return None
 
     def _handle_upstream_table(
         self,
@@ -157,6 +164,12 @@ class UnitycatalogLineageSource(Source):
                             )
                         ),
                     )
+                else:
+                    logger.debug(
+                        f"Unable to find upstream entity for "
+                        f"{upstream_table.catalog_name}.{upstream_table.schema_name}.{upstream_table.name}"
+                        f" -> {databricks_table_fqn}"
+                    )
             except Exception:
                 logger.debug(
                     "Error while processing lineage for "