The base model doesn't generate coherently
I'm having major issues with fine-tuning this model. Is the base model bricked?
Hey
@migtissera
, could you try with the latest transformers release (v4.42.3) and let us know if it fixes your problem? We have validated the model seems to fine-tune correctly in this version.
We also recommend using attn_implementation='eager' in the configuration to use the eager attention instead of Flash Attention to improve the results.
I've noticed the same issue with transformers 4.44.0. Generating using vLLM 0.5.4 for google/gemma-2-9b is fine, but google/gemma-2-27b generates text similar in quality to openai-community/gpt2-medium.
The vLLM didn't support global attention on odd layers. Although a fix has been implemented in the main branch, it hasn't yet been merged into the v0.5.4 release.
If you're using transformers, you need to set attn_implementation='eager' with the released versions. Otherwise, if you want to use flash_attention_2, you'll need to install the main branch to get the fix.