Difference between shutdown(wait=True) and shutdown(wait=False)

When `shutdown(wait=True)` is called - the default - then the executor waits until all future objects completed. In contrast when `shutdown(wait=True)` is called the future objects are cancelled on the queuing system.

Author: jan-janssen

executorlib/executor/flux.py

@@ -9,7 +9,6 @@
     check_plot_dependency_graph,
     check_pmi,
     check_refresh_rate,
-    check_terminate_tasks_on_shutdown,
     validate_number_of_cores,
 )
 from executorlib.task_scheduler.interactive.blockallocation import (
@@ -64,7 +63,6 @@ class FluxJobExecutor(BaseExecutor):
                                       debugging purposes and to get an overview of the specified dependencies.
         plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
         log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-        terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
     Examples:
         ```
@@ -105,7 +103,6 @@ def __init__(
         plot_dependency_graph: bool = False,
         plot_dependency_graph_filename: Optional[str] = None,
         log_obj_size: bool = False,
-        terminate_tasks_on_shutdown: bool = True,
     ):
         """
         The executorlib.FluxJobExecutor leverages either the message passing interface (MPI), the SLURM workload manager
@@ -151,7 +148,6 @@ def __init__(
                                           debugging purposes and to get an overview of the specified dependencies.
             plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
             log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-            terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
         """
         default_resource_dict: dict = {
@@ -167,9 +163,6 @@ def __init__(
         resource_dict.update(
             {k: v for k, v in default_resource_dict.items() if k not in resource_dict}
         )
-        check_terminate_tasks_on_shutdown(
-            terminate_tasks_on_shutdown=terminate_tasks_on_shutdown
-        )
         if not disable_dependencies:
             super().__init__(
                 executor=DependencyTaskScheduler(
@@ -255,7 +248,6 @@ class FluxClusterExecutor(BaseExecutor):
                                       debugging purposes and to get an overview of the specified dependencies.
         plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
         log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-        terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
     Examples:
         ```
@@ -336,7 +328,6 @@ def __init__(
                                           debugging purposes and to get an overview of the specified dependencies.
             plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
             log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-            terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
         """
         default_resource_dict: dict = {
@@ -376,7 +367,6 @@ def __init__(
                     block_allocation=block_allocation,
                     init_function=init_function,
                     disable_dependencies=disable_dependencies,
-                    terminate_tasks_on_shutdown=terminate_tasks_on_shutdown,
                 )
             )
         else:

executorlib/executor/slurm.py

@@ -6,7 +6,6 @@
     check_log_obj_size,
     check_plot_dependency_graph,
     check_refresh_rate,
-    check_terminate_tasks_on_shutdown,
     validate_number_of_cores,
 )
 from executorlib.task_scheduler.interactive.blockallocation import (
@@ -61,7 +60,6 @@ class SlurmClusterExecutor(BaseExecutor):
                                       debugging purposes and to get an overview of the specified dependencies.
         plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
         log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-        terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
     Examples:
         ```
@@ -142,7 +140,6 @@ def __init__(
                                           debugging purposes and to get an overview of the specified dependencies.
             plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
             log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-            terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
         """
         default_resource_dict: dict = {
@@ -182,7 +179,6 @@ def __init__(
                     block_allocation=block_allocation,
                     init_function=init_function,
                     disable_dependencies=disable_dependencies,
-                    terminate_tasks_on_shutdown=terminate_tasks_on_shutdown,
                 )
             )
         else:
@@ -249,7 +245,6 @@ class SlurmJobExecutor(BaseExecutor):
                                       debugging purposes and to get an overview of the specified dependencies.
         plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
         log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-        terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
     Examples:
         ```
@@ -332,7 +327,6 @@ def __init__(
                                           debugging purposes and to get an overview of the specified dependencies.
             plot_dependency_graph_filename (str): Name of the file to store the plotted graph in.
             log_obj_size (bool): Enable debug mode which reports the size of the communicated objects.
-            terminate_tasks_on_shutdown (bool): Shutdown all tasks when the Executor is shutdown, this is the default.
 
         """
         default_resource_dict: dict = {
@@ -348,9 +342,6 @@ def __init__(
         resource_dict.update(
             {k: v for k, v in default_resource_dict.items() if k not in resource_dict}
         )
-        check_terminate_tasks_on_shutdown(
-            terminate_tasks_on_shutdown=terminate_tasks_on_shutdown
-        )
         if not disable_dependencies:
             super().__init__(
                 executor=DependencyTaskScheduler(

executorlib/standalone/inputcheck.py

@@ -211,16 +211,4 @@ def check_log_obj_size(log_obj_size: bool) -> None:
         raise ValueError(
             "log_obj_size is not supported for the executorlib.SlurmClusterExecutor and executorlib.FluxClusterExecutor."
             "Please use log_obj_size=False instead of log_obj_size=True."
-        )
-
-
-def check_terminate_tasks_on_shutdown(terminate_tasks_on_shutdown: bool) -> None:
-    """
-    Check if terminate_tasks_on_shutdown is False and raise a ValueError if it is.
-    """
-    if not terminate_tasks_on_shutdown:
-        raise ValueError(
-            "terminate_tasks_on_shutdown is not supported for the executorlib.SingleNodeExecutor, "
-            "executorlib.SlurmJobExecutor and executorlib.FluxJobExecutor."
-            "Please use terminate_tasks_on_shutdown=True instead of terminate_tasks_on_shutdown=False."
-        )
+        )

executorlib/task_scheduler/file/shared.py

@@ -87,16 +87,17 @@ def execute_tasks_h5(
         with contextlib.suppress(queue.Empty):
             task_dict = future_queue.get_nowait()
         if task_dict is not None and "shutdown" in task_dict and task_dict["shutdown"]:
-            while len(memory_dict) > 0:
-                memory_dict = {
-                    key: _check_task_output(
-                        task_key=key,
-                        future_obj=value,
-                        cache_directory=cache_dir_dict[key],
-                    )
-                    for key, value in memory_dict.items()
-                    if not value.done()
-                }
+            if task_dict["wait"]:
+                while len(memory_dict) > 0:
+                    memory_dict = {
+                        key: _check_task_output(
+                            task_key=key,
+                            future_obj=value,
+                            cache_directory=cache_dir_dict[key],
+                        )
+                        for key, value in memory_dict.items()
+                        if not value.done()
+                    }
             if (
                 terminate_function is not None
                 and terminate_function == terminate_subprocess

executorlib/task_scheduler/file/task_scheduler.py

@@ -95,7 +95,6 @@ def create_file_executor(
     init_function: Optional[Callable] = None,
     disable_dependencies: bool = False,
     execute_function: Callable = execute_with_pysqa,
-    terminate_tasks_on_shutdown: bool = True,
 ):
     if block_allocation:
         raise ValueError(
@@ -113,12 +112,10 @@ def create_file_executor(
     check_executor(executor=flux_executor)
     check_nested_flux_executor(nested_flux_executor=flux_executor_nesting)
     check_flux_log_files(flux_log_files=flux_log_files)
-    if terminate_tasks_on_shutdown and execute_function != execute_in_subprocess:
+    if execute_function != execute_in_subprocess:
         terminate_function = terminate_with_pysqa  # type: ignore
-    elif terminate_tasks_on_shutdown and execute_function == execute_in_subprocess:
-        terminate_function = terminate_subprocess  # type: ignore
     else:
-        terminate_function = None  # type: ignore
+        terminate_function = terminate_subprocess  # type: ignore
     return FileTaskScheduler(
         resource_dict=resource_dict,
         pysqa_config_directory=pysqa_config_directory,

tests/test_standalone_inputcheck.py

@@ -18,7 +18,6 @@
     check_hostname_localhost,
     check_pysqa_config_directory,
     check_file_exists,
-    check_terminate_tasks_on_shutdown,
     check_log_obj_size,
     validate_number_of_cores,
 )
@@ -125,7 +124,3 @@ def test_validate_number_of_cores(self):
     def test_check_log_obj_size(self):
         with self.assertRaises(ValueError):
             check_log_obj_size(log_obj_size=True)
-
-    def test_terminate_tasks_on_shutdown(self):
-        with self.assertRaises(ValueError):
-            check_terminate_tasks_on_shutdown(terminate_tasks_on_shutdown=False)