diff --git a/app/api/qgis_map_export.py b/app/api/qgis_map_export.py
index 3771978..5c7db0e 100644
--- a/app/api/qgis_map_export.py
+++ b/app/api/qgis_map_export.py
@@ -316,7 +316,7 @@ def _background_export(inference_id: int) -> None:
             status = "FAIL" if "error" in r else "OK"
             logger.info(f"[Pool] {status} {r.get('name', '?')}: {r.get('error', r.get('output', ''))[:100]}")
             if inference_id and file_store and "error" not in r:
-                _write_single_path(inference_id, r.get("output", ""), file_store, db_lock)
+                _write_single_path(inference_id, r["output"], file_store, db_lock)
 
         results, summary = qgis_pool.submit_job(config, container_models, _on_progress)
 
diff --git a/app/services/qgis/qgis_pool.py b/app/services/qgis/qgis_pool.py
index e2752ac..589b1ac 100644
--- a/app/services/qgis/qgis_pool.py
+++ b/app/services/qgis/qgis_pool.py
@@ -139,7 +139,7 @@ class QgisPool:
             for line in worker.proc.stderr:
                 line = line.strip()
                 if line:
-                    logger.debug(f"[Worker-{worker.worker_id}] stderr: {line}")
+                    logger.info(f"[Worker-{worker.worker_id}] {line}")
         except Exception:
             pass
 
diff --git a/app/services/qgis/qgis_worker.py b/app/services/qgis/qgis_worker.py
index c3efd0b..9eb599c 100644
--- a/app/services/qgis/qgis_worker.py
+++ b/app/services/qgis/qgis_worker.py
@@ -188,4 +188,11 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    try:
+        main()
+    except Exception as e:
+        # 捕获 main() 未处理的异常，确保输出到 stderr
+        import traceback
+        print(f"[worker] 未捕获异常: {e}", file=sys.stderr)
+        traceback.print_exc(file=sys.stderr)
+        sys.exit(1)