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bug fixed: wandb artifact requires the tracker file #1654

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bug fixed: wandb artifact requires the tracker file #1654

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bug fixed: wandb artifact requires the tracker file
yezhengmao1 Jun 27, 2025
2efc870
Merge branch 'main' into bugfix_wandb
Phlip79 Mar 4, 2026
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6 changes: 4 additions & 2 deletions megatron/training/checkpointing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -788,9 +788,11 @@ def onelogger_finalize_fn():
else:
onelogger_finalize_fn()

# Additional callback for wandb (last rank)
# Additional callback for wandb
# The wandb artifact requires the tracker file to be present, so we need to ensure
# that rank 0 has already saved it before proceeding with wandb operations
if not torch.distributed.is_initialized() \
or is_last_rank():
or torch.distributed.get_rank() == 0:
def wandb_finalize_fn():
wandb_utils.on_save_checkpoint_success(checkpoint_name, get_checkpoint_tracker_filename(save_dir), save_dir, iteration)
if args.async_save:
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