Fix bugs related to loss mask, meta info, and response length #21
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−61
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1. Construct the loss mask immediately after obtaining the observation to prevent encoding misalignment when converting back to tokens after text transformation. 2. Follow up on meta info to ensure that the test batch can apply do sample. 3. Remove the recording of info information for response length.
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critic/kl, information tokens should not be included, as they are not samples generated by the policy. Otherwise, it may lead to a severe negative KL explosion.After fixing these bugs, the RL training remains stable for a much longer duration:
