fix retry document db session issue (#23046)

api/tasks/retry_document_indexing_task.py

     """
     documents: list[Document] = []
     start_at = time.perf_counter()
+    try:
+        dataset = db.session.query(Dataset).where(Dataset.id == dataset_id).first()
+        if not dataset:
+            logging.info(click.style(f"Dataset not found: {dataset_id}", fg="red"))
+            return
+        tenant_id = dataset.tenant_id
+        for document_id in document_ids:
+            retry_indexing_cache_key = f"document_{document_id}_is_retried"
+            # check document limit
+            features = FeatureService.get_features(tenant_id)
+            try:
+                if features.billing.enabled:
+                    vector_space = features.vector_space
+                    if 0 < vector_space.limit <= vector_space.size:
+                        raise ValueError(
+                            "Your total number of documents plus the number of uploads have over the limit of "
+                            "your subscription."
+                        )
+            except Exception as e:
+                document = (
+                    db.session.query(Document)
+                    .where(Document.id == document_id, Document.dataset_id == dataset_id)
+                    .first()
+                )
+                if document:
+                    document.indexing_status = "error"
+                    document.error = str(e)
+                    document.stopped_at = datetime.datetime.now(datetime.UTC).replace(tzinfo=None)
+                    db.session.add(document)
+                    db.session.commit()
+                redis_client.delete(retry_indexing_cache_key)
+                return
 
-    dataset = db.session.query(Dataset).where(Dataset.id == dataset_id).first()
-    if not dataset:
-        logging.info(click.style(f"Dataset not found: {dataset_id}", fg="red"))
-        db.session.close()
-        return
-    tenant_id = dataset.tenant_id
-    for document_id in document_ids:
-        retry_indexing_cache_key = f"document_{document_id}_is_retried"
-        # check document limit
-        features = FeatureService.get_features(tenant_id)
-        try:
-            if features.billing.enabled:
-                vector_space = features.vector_space
-                if 0 < vector_space.limit <= vector_space.size:
-                    raise ValueError(
-                        "Your total number of documents plus the number of uploads have over the limit of "
-                        "your subscription."
-                    )
-        except Exception as e:
+            logging.info(click.style(f"Start retry document: {document_id}", fg="green"))
             document = (
                 db.session.query(Document).where(Document.id == document_id, Document.dataset_id == dataset_id).first()
             )
-            if document:
+            if not document:
+                logging.info(click.style(f"Document not found: {document_id}", fg="yellow"))
+                return
+            try:
+                # clean old data
+                index_processor = IndexProcessorFactory(document.doc_form).init_index_processor()
+
+                segments = db.session.query(DocumentSegment).where(DocumentSegment.document_id == document_id).all()
+                if segments:
+                    index_node_ids = [segment.index_node_id for segment in segments]
+                    # delete from vector index
+                    index_processor.clean(dataset, index_node_ids, with_keywords=True, delete_child_chunks=True)
+
+                for segment in segments:
+                    db.session.delete(segment)
+                db.session.commit()
+
+                document.indexing_status = "parsing"
+                document.processing_started_at = datetime.datetime.now(datetime.UTC).replace(tzinfo=None)
+                db.session.add(document)
+                db.session.commit()
+
+                indexing_runner = IndexingRunner()
+                indexing_runner.run([document])
+                redis_client.delete(retry_indexing_cache_key)
+            except Exception as ex:
                 document.indexing_status = "error"
-                document.error = str(e)
+                document.error = str(ex)
                 document.stopped_at = datetime.datetime.now(datetime.UTC).replace(tzinfo=None)
                 db.session.add(document)
                 db.session.commit()
-            redis_client.delete(retry_indexing_cache_key)
-            db.session.close()
-            return
-
-        logging.info(click.style(f"Start retry document: {document_id}", fg="green"))
-        document = (
-            db.session.query(Document).where(Document.id == document_id, Document.dataset_id == dataset_id).first()
+                logging.info(click.style(str(ex), fg="yellow"))
+                redis_client.delete(retry_indexing_cache_key)
+                logging.exception("retry_document_indexing_task failed, document_id: %s", document_id)
+            end_at = time.perf_counter()
+            logging.info(click.style(f"Retry dataset: {dataset_id} latency: {end_at - start_at}", fg="green"))
+    except Exception as e:
+        logging.exception(
+            "retry_document_indexing_task failed, dataset_id: %s, document_ids: %s", dataset_id, document_ids
         )
-        if not document:
-            logging.info(click.style(f"Document not found: {document_id}", fg="yellow"))
-            db.session.close()
-            return
-        try:
-            # clean old data
-            index_processor = IndexProcessorFactory(document.doc_form).init_index_processor()
-
-            segments = db.session.query(DocumentSegment).where(DocumentSegment.document_id == document_id).all()
-            if segments:
-                index_node_ids = [segment.index_node_id for segment in segments]
-                # delete from vector index
-                index_processor.clean(dataset, index_node_ids, with_keywords=True, delete_child_chunks=True)
-
-            for segment in segments:
-                db.session.delete(segment)
-            db.session.commit()
-
-            document.indexing_status = "parsing"
-            document.processing_started_at = datetime.datetime.now(datetime.UTC).replace(tzinfo=None)
-            db.session.add(document)
-            db.session.commit()
-
-            indexing_runner = IndexingRunner()
-            indexing_runner.run([document])
-            redis_client.delete(retry_indexing_cache_key)
-        except Exception as ex:
-            document.indexing_status = "error"
-            document.error = str(ex)
-            document.stopped_at = datetime.datetime.now(datetime.UTC).replace(tzinfo=None)
-            db.session.add(document)
-            db.session.commit()
-            logging.info(click.style(str(ex), fg="yellow"))
-            redis_client.delete(retry_indexing_cache_key)
-            logging.exception("retry_document_indexing_task failed, document_id: %s", document_id)
-        finally:
-            db.session.close()
-    end_at = time.perf_counter()
-    logging.info(click.style(f"Retry dataset: {dataset_id} latency: {end_at - start_at}", fg="green"))
+        raise e
+    finally:
+        db.session.close()