locking media directory while deleting files

src/documents/signals/handlers.py

@@ -171,6 +171,7 @@ def run_post_consume_script(sender, document, **kwargs):
 
 @receiver(models.signals.post_delete, sender=Document)
 def cleanup_document_deletion(sender, instance, using, **kwargs):
+    with FileLock(settings.MEDIA_LOCK):
         for f in (instance.source_path,
                   instance.archive_path,
                   instance.thumbnail_path):