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Avoid querying metadata query to check if it's GCE if TPU_SKIP_MDS_QUERY is set. #24394

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Avoid querying metadata query to check if it's GCE if TPU_SKIP_MDS_QUERY is set. #24394

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3 changes: 3 additions & 0 deletions jax/_src/clusters/cloud_tpu_cluster.py
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Original file line number Diff line number Diff line change
Expand Up @@ -180,6 +180,9 @@ def is_env_present(cls) -> bool:
if not running_in_cloud_tpu_vm:
logger.debug("Did not detect cloud TPU VM")
return False
if os.environ.get("TPU_SKIP_MDS_QUERY") is not None:
logger.debug("TPU_SKIP_MDS_QUERY is set to True, so it's probably not a GCE TPU cluster.")
return False
metadata_response, metadata_code = get_metadata('agent-worker-number')
if metadata_code == metadata_response_code_success:
logger.debug("Gce Tpu Cluster detected for Jax Distributed System")
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