Retry action, basic frontend, cleanup handler

src/documents/signals/handlers.py

@@ -631,6 +631,19 @@ def update_filename_and_move_files(
             )
 
 
+@receiver(models.signals.post_save, sender=PaperlessTask)
+def cleanup_failed_documents(sender, instance: PaperlessTask, **kwargs):
+    if instance.status != states.FAILURE or not instance.acknowledged:
+        return
+
+    if instance.task_file_name:
+        try:
+            Path(settings.CONSUMPTION_FAILED_DIR / instance.task_file_name).unlink()
+            logger.debug(f"Cleaned up failed file {instance.task_file_name}")
+        except FileNotFoundError:
+            logger.warning(f"Failed to clean up failed file {instance.task_file_name}")
+
+
 @shared_task
 def process_cf_select_update(custom_field: CustomField) -> None:
     """

src/documents/tasks.py

@@ -247,8 +247,8 @@ def retry_failed_file(task_id: str, clean: bool = False, skip_ocr: bool = False)
     if task:
         failed_file = settings.CONSUMPTION_FAILED_DIR / task.task_file_name
         if not failed_file.exists():
-            logger.error(f"Failed file {failed_file} not found")
-            return
+            logger.error(f"File {failed_file} not found")
+            raise FileNotFoundError(f"File {failed_file} not found")
         working_copy = settings.SCRATCH_DIR / failed_file.name
         copy_file_with_basic_stats(failed_file, working_copy)
 
@@ -271,15 +271,17 @@ def retry_failed_file(task_id: str, clean: bool = False, skip_ocr: bool = False)
                     logger.debug("PDF cleaned successfully")
             except Exception as e:
                 logger.error(f"Error while cleaning PDF: {e}")
-                return
+                raise e
 
-        consume_file(
+        task = consume_file.delay(
             ConsumableDocument(
                 source=DocumentSource.ConsumeFolder,
                 original_file=working_copy,
             ),
         )
 
+        return task.id
+
 
 @shared_task
 def sanity_check(*, scheduled=True, raise_on_error=True):

src/documents/tests/test_tasks.py

@@ -1,4 +1,5 @@
 import shutil
+import uuid
 from datetime import timedelta
 from pathlib import Path
 from unittest import mock
@@ -11,6 +12,8 @@ from django.test import override_settings
 from django.utils import timezone
 
 from documents import tasks
+from documents.data_models import ConsumableDocument
+from documents.data_models import DocumentSource
 from documents.models import Correspondent
 from documents.models import Document
 from documents.models import DocumentType
@@ -18,9 +21,13 @@ from documents.models import PaperlessTask
 from documents.models import Tag
 from documents.sanity_checker import SanityCheckFailedException
 from documents.sanity_checker import SanityCheckMessages
+from documents.signals.handlers import before_task_publish_handler
+from documents.signals.handlers import task_failure_handler
 from documents.tests.test_classifier import dummy_preprocess
 from documents.tests.utils import DirectoriesMixin
+from documents.tests.utils import DummyProgressManager
 from documents.tests.utils import FileSystemAssertsMixin
+from documents.tests.utils import SampleDirMixin
 
 
 class TestIndexReindex(DirectoriesMixin, TestCase):
@@ -232,6 +239,70 @@ class TestEmptyTrashTask(DirectoriesMixin, FileSystemAssertsMixin, TestCase):
         self.assertEqual(Document.global_objects.count(), 0)
 
 
+class TestRetryConsumeTask(
+    DirectoriesMixin,
+    SampleDirMixin,
+    FileSystemAssertsMixin,
+    TestCase,
+):
+    def do_failed_task(self, test_file: Path) -> PaperlessTask:
+        temp_copy = self.dirs.scratch_dir / test_file.name
+        shutil.copy(test_file, temp_copy)
+
+        headers = {
+            "id": str(uuid.uuid4()),
+            "task": "documents.tasks.consume_file",
+        }
+        body = (
+            # args
+            (
+                ConsumableDocument(
+                    source=DocumentSource.ConsumeFolder,
+                    original_file=str(temp_copy),
+                ),
+                None,
+            ),
+            # kwargs
+            {},
+            # celery metadata
+            {"callbacks": None, "errbacks": None, "chain": None, "chord": None},
+        )
+        before_task_publish_handler(headers=headers, body=body)
+
+        with mock.patch("documents.tasks.ProgressManager", DummyProgressManager):
+            with self.assertRaises(Exception):
+                tasks.consume_file(
+                    ConsumableDocument(
+                        source=DocumentSource.ConsumeFolder,
+                        original_file=temp_copy,
+                    ),
+                )
+
+        task_failure_handler(
+            task_id=headers["id"],
+            exception="Example failure",
+        )
+
+        task = PaperlessTask.objects.first()
+        self.assertIsFile(settings.CONSUMPTION_FAILED_DIR / task.task_file_name)
+        return task
+
+    @mock.patch("documents.tasks.consume_file.delay")
+    @mock.patch("documents.tasks.run_subprocess")
+    def test_retry_consume_clean(self, m_subprocess, m_consume_file) -> None:
+        task = self.do_failed_task(self.SAMPLE_DIR / "corrupted.pdf")
+        m_subprocess.return_value.returncode = 0
+        task_id = tasks.retry_failed_file(task_id=task.task_id, clean=True)
+        self.assertIsNotNone(task_id)
+        m_consume_file.assert_called_once()
+
+    def test_cleanup(self) -> None:
+        task = self.do_failed_task(self.SAMPLE_DIR / "corrupted.pdf")
+        task.acknowledged = True
+        task.save()
+        self.assertIsNotFile(settings.CONSUMPTION_FAILED_DIR / task.task_file_name)
+
+
 class TestUpdateContent(DirectoriesMixin, TestCase):
     def test_update_content_maybe_archive_file(self) -> None:
         """

src/documents/views.py

@@ -211,6 +211,7 @@ from documents.tasks import consume_file
 from documents.tasks import empty_trash
 from documents.tasks import index_optimize
 from documents.tasks import llmindex_index
+from documents.tasks import retry_failed_file
 from documents.tasks import sanity_check
 from documents.tasks import train_classifier
 from documents.tasks import update_document_parent_tags
@@ -3467,6 +3468,18 @@ class TasksViewSet(ReadOnlyModelViewSet):
             queryset = PaperlessTask.objects.filter(task_id=task_id)
         return queryset
 
+    @action(methods=["post"], detail=True)
+    def retry(self, request, pk=None):
+        task = self.get_object()
+        try:
+            new_task_id = retry_failed_file(task.task_id, True)
+            return Response({"task_id": new_task_id})
+        except Exception as e:
+            logger.warning(f"An error occurred retrying task: {e!s}")
+            return HttpResponseBadRequest(
+                "Error retrying task, check logs for more detail.",
+            )
+
     @action(
         methods=["post"],
         detail=False,