Update trainer.py

src/axolotl/utils/trainer.py

@@ -103,8 +103,8 @@ def setup_trainer(cfg, train_dataset, eval_dataset, model, tokenizer):
         group_by_length=cfg.group_by_length,
         report_to="wandb" if cfg.use_wandb else None,
         run_name=cfg.wandb_run_id if cfg.use_wandb else None,
-        optim=cfg.optimizer if cfg.optimizer else None,
-        lr_scheduler_type=cfg.lr_scheduler if cfg.lr_scheduler in ("one_cycle", "log_sweep") else "cosine",
+        optim=cfg.optimizer if cfg.optimizer else "adamw_hf",
+        lr_scheduler_type=cfg.lr_scheduler if cfg.lr_scheduler and cfg.lr_scheduler not in ("one_cycle", "log_sweep") else "cosine",
         weight_decay=cfg.weight_decay if cfg.weight_decay is not None else 0.0,
         **training_arguments_kwargs,
     )