Add batch timeout override (#3501)

# Description

Add environment variable option to set batch timeout limit.

Evaluation is only local currently, so no need to check user input.

# All Promptflow Contribution checklist:
- [x] **The pull request does not introduce [breaking changes].**
- [x] **CHANGELOG is updated for new features, bug fixes or other
significant changes.**
- [x] **I have read the [contribution guidelines](../CONTRIBUTING.md).**
- [ ] **Create an issue and link to the pull request to get dedicated
review from promptflow team. Learn more: [suggested
workflow](../CONTRIBUTING.md#suggested-workflow).**

## General Guidelines and Best Practices
- [x] Title of the pull request is clear and informative.
- [x] There are a small number of commits, each of which have an
informative message. This means that previously merged commits do not
appear in the history of the PR. For more information on cleaning up the
commits in your PR, [see this
page](https://github.com/Azure/azure-powershell/blob/master/documentation/development-docs/cleaning-up-commits.md).

### Testing Guidelines
- [x] Pull request includes test coverage for the included changes.

src/promptflow-evals/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Features Added
 - Introduced `JailbreakAdversarialSimulator` for customers who need to do run jailbreak and non jailbreak adversarial simulations at the same time. More info in the README.md in `/promptflow/evals/synthetic/README.md#jailbreak-simulator`
+- Exposed batch evaluation run timeout via "PF_BATCH_TIMEOUT_SEC" environment variable. This variable can be used to set the timeout for the batch evaluation for each evaluator and target separately only, not the entire API call.
 
 ### Bugs Fixed
 - Large simulation was causing a jinja exception, this has been fixed.

src/promptflow-evals/promptflow/evals/_constants.py

@@ -23,4 +23,5 @@ class Prefixes:
 
 CONTENT_SAFETY_DEFECT_RATE_THRESHOLD_DEFAULT = 4
 
-BATCH_RUN_TIMEOUT = 3600
+PF_BATCH_TIMEOUT_SEC_DEFAULT = 3600
+PF_BATCH_TIMEOUT_SEC = "PF_BATCH_TIMEOUT_SEC"

src/promptflow-evals/promptflow/evals/evaluate/_batch_run_client/batch_run_context.py

@@ -5,6 +5,7 @@
 
 from promptflow._sdk._constants import PF_FLOW_ENTRY_IN_TMP, PF_FLOW_META_LOAD_IN_SUBPROCESS
 from promptflow._utils.user_agent_utils import ClientUserAgentUtil
+from promptflow.evals._constants import PF_BATCH_TIMEOUT_SEC, PF_BATCH_TIMEOUT_SEC_DEFAULT
 from promptflow.tracing._integrations._openai_injector import inject_openai_api, recover_openai_api
 
 from ..._user_agent import USER_AGENT
@@ -16,6 +17,7 @@
 class BatchRunContext:
     def __init__(self, client):
         self.client = client
+        self._is_timeout_set_by_system = False
 
     def __enter__(self):
         if isinstance(self.client, CodeClient):
@@ -26,6 +28,10 @@ def __enter__(self):
             os.environ[PF_FLOW_ENTRY_IN_TMP] = "true"
             os.environ[PF_FLOW_META_LOAD_IN_SUBPROCESS] = "false"
 
+            if os.environ.get(PF_BATCH_TIMEOUT_SEC) is None:
+                os.environ[PF_BATCH_TIMEOUT_SEC] = str(PF_BATCH_TIMEOUT_SEC_DEFAULT)
+                self._is_timeout_set_by_system = True
+
             # For addressing the issue of asyncio event loop closed on Windows
             set_event_loop_policy()
 
@@ -36,3 +42,7 @@ def __exit__(self, exc_type, exc_val, exc_tb):
         if isinstance(self.client, ProxyClient):
             os.environ.pop(PF_FLOW_ENTRY_IN_TMP, None)
             os.environ.pop(PF_FLOW_META_LOAD_IN_SUBPROCESS, None)
+
+            if self._is_timeout_set_by_system:
+                os.environ.pop(PF_BATCH_TIMEOUT_SEC, None)
+                self._is_timeout_set_by_system = False

src/promptflow-evals/promptflow/evals/evaluate/_batch_run_client/code_client.py

@@ -8,10 +8,10 @@
 import pandas as pd
 
 from promptflow.contracts.types import AttrDict
-from promptflow.evals.evaluate._utils import _apply_column_mapping, _has_aggregator, load_jsonl
+from promptflow.evals.evaluate._utils import _apply_column_mapping, _has_aggregator, get_int_env_var, load_jsonl
 from promptflow.tracing import ThreadPoolExecutorWithContext as ThreadPoolExecutor
 
-from ..._constants import BATCH_RUN_TIMEOUT
+from ..._constants import PF_BATCH_TIMEOUT_SEC, PF_BATCH_TIMEOUT_SEC_DEFAULT
 
 LOGGER = logging.getLogger(__name__)
 
@@ -24,15 +24,17 @@ def __init__(self, run, input_data, evaluator_name=None, aggregated_metrics=None
         self.aggregated_metrics = aggregated_metrics
 
     def get_result_df(self, exclude_inputs=False):
-        result_df = self.run.result(timeout=BATCH_RUN_TIMEOUT)
+        batch_run_timeout = get_int_env_var(PF_BATCH_TIMEOUT_SEC, PF_BATCH_TIMEOUT_SEC_DEFAULT)
+        result_df = self.run.result(timeout=batch_run_timeout)
         if exclude_inputs:
             result_df = result_df.drop(columns=[col for col in result_df.columns if col.startswith("inputs.")])
         return result_df
 
     def get_aggregated_metrics(self):
         try:
+            batch_run_timeout = get_int_env_var(PF_BATCH_TIMEOUT_SEC, PF_BATCH_TIMEOUT_SEC_DEFAULT)
             aggregated_metrics = (
-                self.aggregated_metrics.result(timeout=BATCH_RUN_TIMEOUT)
+                self.aggregated_metrics.result(timeout=batch_run_timeout)
                 if self.aggregated_metrics is not None
                 else None
             )

src/promptflow-evals/promptflow/evals/evaluate/_batch_run_client/proxy_client.py

@@ -9,8 +9,6 @@
 from promptflow.client import PFClient
 from promptflow.tracing import ThreadPoolExecutorWithContext as ThreadPoolExecutor
 
-from ..._constants import BATCH_RUN_TIMEOUT
-
 LOGGER = logging.getLogger(__name__)
 
 
@@ -41,13 +39,13 @@ def run(self, flow, data, column_mapping=None, **kwargs):
         return ProxyRun(run=eval_future)
 
     def get_details(self, proxy_run, all_results=False):
-        run = proxy_run.run.result(timeout=BATCH_RUN_TIMEOUT)
+        run = proxy_run.run.result()
         result_df = self._pf_client.get_details(run, all_results=all_results)
         result_df.replace("(Failed)", np.nan, inplace=True)
         return result_df
 
     def get_metrics(self, proxy_run):
-        run = proxy_run.run.result(timeout=BATCH_RUN_TIMEOUT)
+        run = proxy_run.run.result()
         return self._pf_client.get_metrics(run)
 
     @staticmethod

src/promptflow-evals/promptflow/evals/evaluate/_utils.py

@@ -204,6 +204,22 @@ def _has_aggregator(evaluator):
     return hasattr(evaluator, "__aggregate__")
 
 
+def get_int_env_var(env_var_name, default_value=None):
+    """
+    The function `get_int_env_var` retrieves an integer environment variable value, with an optional
+    default value if the variable is not set or cannot be converted to an integer.
+
+    :param env_var_name: The name of the environment variable you want to retrieve the value of
+    :param default_value: The default value is the value that will be returned if the environment
+    variable is not found or if it cannot be converted to an integer
+    :return: an integer value.
+    """
+    try:
+        return int(os.environ.get(env_var_name, default_value))
+    except Exception:
+        return default_value
+
+
 def set_event_loop_policy():
     import asyncio
     import platform

src/promptflow-evals/tests/evals/unittests/test_batch_run_context.py

@@ -1,10 +1,12 @@
+import os
 from unittest.mock import MagicMock
 
 import pytest
 
 from promptflow.client import PFClient
+from promptflow.evals._constants import PF_BATCH_TIMEOUT_SEC, PF_BATCH_TIMEOUT_SEC_DEFAULT
 from promptflow.evals._user_agent import USER_AGENT
-from promptflow.evals.evaluate._batch_run_client import BatchRunContext, CodeClient
+from promptflow.evals.evaluate._batch_run_client import BatchRunContext, CodeClient, ProxyClient
 
 
 @pytest.fixture
@@ -50,3 +52,27 @@ def test_with_pfclient(self, mocker, pf_client_mock):
             pass
 
         mock_recover_openai_api.assert_not_called()
+
+    def test_batch_timeout_default(self):
+        before_timeout = os.environ.get(PF_BATCH_TIMEOUT_SEC)
+        assert before_timeout is None
+
+        with BatchRunContext(ProxyClient(PFClient)):
+            during_timeout = int(os.environ.get(PF_BATCH_TIMEOUT_SEC))
+            assert during_timeout == PF_BATCH_TIMEOUT_SEC_DEFAULT
+
+        # Default timeout should be reset after exiting BatchRunContext
+        after_timeout = os.environ.get(PF_BATCH_TIMEOUT_SEC)
+        assert after_timeout is None
+
+    def test_batch_timeout_custom(self):
+        custom_timeout = 1000
+        os.environ[PF_BATCH_TIMEOUT_SEC] = str(custom_timeout)
+
+        with BatchRunContext(ProxyClient(PFClient)):
+            during_timeout = int(os.environ.get(PF_BATCH_TIMEOUT_SEC))
+            assert during_timeout == custom_timeout
+
+        # Custom timeouts should not be reset after exiting BatchRunContext
+        after_timeout = int(os.environ.get(PF_BATCH_TIMEOUT_SEC))
+        assert after_timeout == custom_timeout