revert a faulty change that caused memory usage to explode #537

src/documents/classifier.py

@@ -5,7 +5,6 @@ import pickle
 import re
 
 from django.conf import settings
-from django.core.cache import cache
 
 from documents.models import Document, MatchingModel
 
@@ -31,29 +30,23 @@ def load_classifier():
         )
         return None
 
-    version = os.stat(settings.MODEL_FILE).st_mtime
+    classifier = DocumentClassifier()
+    try:
+        classifier.load()
 
-    classifier = cache.get("paperless-classifier", version=version)
-
-    if not classifier:
-        classifier = DocumentClassifier()
-        try:
-            classifier.load()
-            cache.set("paperless-classifier", classifier,
-                      version=version, timeout=86400)
-        except (EOFError, IncompatibleClassifierVersionError) as e:
-            # there's something wrong with the model file.
-            logger.exception(
-                f"Unrecoverable error while loading document "
-                f"classification model, deleting model file."
-            )
-            os.unlink(settings.MODEL_FILE)
-            classifier = None
-        except OSError as e:
-            logger.error(
-                f"Error while loading document classification model: {str(e)}"
-            )
-            classifier = None
+    except (EOFError, IncompatibleClassifierVersionError) as e:
+        # there's something wrong with the model file.
+        logger.exception(
+            f"Unrecoverable error while loading document "
+            f"classification model, deleting model file."
+        )
+        os.unlink(settings.MODEL_FILE)
+        classifier = None
+    except OSError as e:
+        logger.error(
+            f"Error while loading document classification model: {str(e)}"
+        )
+        classifier = None
 
     return classifier