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Feat: Warn when doing local torch elastic training with nnodes > 1 #1697

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Jun 19, 2023
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Feat: Warn when doing local torch elastic training with nnodes > 1 #1697

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10 changes: 10 additions & 0 deletions plugins/flytekit-kf-pytorch/flytekitplugins/kfpytorch/task.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@
from flytekit.configuration import SerializationSettings
from flytekit.core.resources import convert_resources_to_resource_model
from flytekit.extend import IgnoreOutputs, TaskPlugins
from flytekit.loggers import logger

TORCH_IMPORT_ERROR_MESSAGE = "PyTorch is not installed. Please install `flytekitplugins-kfpytorch['elastic']`."

Expand Down Expand Up @@ -274,6 +275,15 @@ def _execute(self, **kwargs) -> Any:
else:
nproc = self.task_config.nproc_per_node

dist_env_vars_set = os.environ.get("PET_NNODES") is not None
if not dist_env_vars_set and self.min_nodes > 1:
logger.warning(
(
f"`nnodes` is set to {self.task_config.nnodes} in elastic task but execution appears "
"to not run in a `PyTorchJob`. Rendezvous might timeout."
)
)

config = LaunchConfig(
run_id=flytekit.current_context().execution_id.name,
min_nodes=self.min_nodes,
Expand Down