add ddp_timeout argument in SFTConfig to avoid timeout error(issue #160)

[HowToNameMe]

fix issue #160

[edbeeching]

hi @HowToNameMe . Thanks for your PR, I am not sure how just adding this to the config resolves the issue. Do you not need to set a var somewhere? Or does this override a default value?

[HowToNameMe]

@edbeeching Thanks for your review. The issue #160 happens when NCCL fails out of the ddp timeout. The parameter corresponding to ddp timeout is in the transformers repository and not exposed to the developers of open-r1. To tackle this issue, we need to add the ddp_timeout to the SFTConfig and override the default value in transformers(30 minutes) with 24 hours.

[edbeeching]

@HowToNameMe , SFTConfig is a child class of TrainingArguments, so you should be able to set this option at the command line / config file.

[HowToNameMe]

@edbeeching Thanks for your guidance. It is possible to override the ddp_timeout in command line.