更新

backend/tests/test_batch_start_api.py

@@ -213,6 +213,55 @@ class BatchStartApiTests(unittest.IsolatedAsyncioTestCase):
         )
         self.assertEqual(result["status"], "running")
 
+    async def test_batch_start_holds_no_db_connection_while_it_waits(self):
+        """A queued start must not pin one of the few pooled connections.
+
+        Credential validation and readiness waiting take seconds per account.
+        Holding a session open across them exhausted the pool during a bulk
+        start, so every unrelated request waited out ``pool_timeout``.
+        """
+        account = SimpleNamespace(
+            id=505,
+            status="starting",
+            qr_code_base64=None,
+            error_message=None,
+            im_session_data="saved-session",
+        )
+        events: list[str] = []
+        assessment = {
+            "login_mode": "im_direct",
+            "should_reset": False,
+            "can_skip_browser": True,
+            "message": "ready",
+            "cookie_valid": True,
+            "im_ready": True,
+        }
+
+        async def commit():
+            events.append("release")
+
+        async def assess(*_args, **_kwargs):
+            events.append("assess")
+            return assessment
+
+        async def start_worker(*_args, **_kwargs):
+            events.append("start-worker")
+            return True
+
+        db = SimpleNamespace(commit=AsyncMock(side_effect=commit))
+
+        with (
+            patch.object(main.manager, "is_running", return_value=False),
+            patch.object(main.manager, "start_worker", AsyncMock(side_effect=start_worker)),
+            patch.object(main, "_get_account_cookie_data", return_value="{}"),
+            patch.object(main, "assess_account_credential", AsyncMock(side_effect=assess)),
+        ):
+            await main._start_account_rpa_impl(account, db, wait_for_ready=True)
+
+        # "starting" was already persisted, so the only commits here exist to
+        # return the connection: one before validation, one before the wait.
+        self.assertEqual(events, ["release", "assess", "release", "start-worker"])
+
     async def test_batch_start_does_not_launch_interactive_browser_login(self):
         account = SimpleNamespace(
             id=504,