EmbedderCache - Log loading/saving errors

Orange/misc/tests/test_embedder_utils.py

@@ -130,6 +130,20 @@ def test_load_cache_no_permission(self):
             cache = EmbedderCache("TestModel")
         self.assertDictEqual({}, cache._cache_dict)
 
+    def test_load_cache_eof_error(self):
+        # prepare a file
+        cache = EmbedderCache("TestModel")
+        self.assertDictEqual({}, cache._cache_dict)
+        cache.add("abc", [1, 2, 3])
+        cache.persist_cache()
+
+        # eof error
+        with patch(
+            "Orange.misc.utils.embedder_utils.pickle.load", side_effect=EOFError,
+        ):
+            cache = EmbedderCache("TestModel")
+            self.assertDictEqual({}, cache._cache_dict)
+
 
 if __name__ == "__main__":
     unittest.main()

Orange/misc/utils/embedder_utils.py

@@ -47,15 +47,25 @@ def save_pickle(obj, file_name):
             with open(file_name, 'wb') as f:
                 pickle.dump(obj, f)
         except PermissionError:
-            # do not save cache if no right permission
-            pass
+            # skip saving cache if no right permissions
+            log.warning(
+                "Embedding cache cannot be saved to %s due to permission error.",
+                file_name,
+            )
 
     @staticmethod
     def load_pickle(file_name):
         try:
             with open(file_name, 'rb') as f:
                 return pickle.load(f)
-        except (EOFError, PermissionError):
+        except (EOFError, PermissionError) as ex:
+            # load empty cache if no permission or EOF error
+            errors = {EOFError: "end of file", PermissionError: "permission"}
+            log.warning(
+                "Embedding cache cannot be loaded from %s due to %s error.",
+                file_name,
+                errors[type(ex)],
+            )
             return {}
 
     @staticmethod