Training error with custom open nmt

[sai-prasanna]

I tried starting training for my data in the downloaded OpenNmt with the following flags,

python train.py -gpuid 2 -save_model training/models -data training/data/data -layers 6 \
    -rnn_size 512 -word_vec_size 512 -epochs 30 -max_grad_norm 0 -optim adam \
    -encoder_type transformer -decoder_type transformer -position_encoding \
    -dropout 0.1 -param_init 0 -warmup_steps 12000 -learning_rate 0.2 \
    -decay_method noam -label_smoothing 0.1 -adam_beta2 0.98 -batch_size 80 \
    -start_decay_at 31

It throws the following error

* number of parameters: 91402259
encoder:  34166272
decoder:  57235987

Loading train dataset from training/data/data.train.1.pt, number of examples: 1872377
/home/sai/anaconda3/envs/s2sv/lib/python3.6/site-packages/torch/nn/modules/module.py:357: UserWarning: Implicit dimension choice for softmax has been deprecated. Change the call to include dim=X as an argument.
  result = self.forward(*input, **kwargs)
Traceback (most recent call last):
  File "train.py", line 405, in <module>
    main()
  File "train.py", line 401, in main
    train_model(model, fields, optim, data_type, model_opt)
  File "train.py", line 219, in train_model
    train_stats = trainer.train(train_iter, epoch, report_func)
  File "/home/sai/grammar/OpenNMT-py/onmt/Trainer.py", line 214, in train
    report_stats, normalization)
  File "/home/sai/grammar/OpenNMT-py/onmt/Trainer.py", line 179, in gradient_accumulation
    self.model(src, tgt, src_lengths, dec_state)
  File "/home/sai/anaconda3/envs/s2sv/lib/python3.6/site-packages/torch/nn/modules/module.py", line 357, in __call__
    result = self.forward(*input, **kwargs)
  File "/home/sai/grammar/OpenNMT-py/onmt/Models.py", line 561, in forward
    context_lengths=lengths)
ValueError: not enough values to unpack (expected 4, got 3)

Any idea on how to fix this ? I am using conda 4.5.4, the setup script didn't install pytorch into the s2sv environment, so I just ran
conda install pytorch=0.3.1 -c soumith
after source activate .

[sebastianGehrmann]

As a test for training the model, can you use this commit on the main branch: OpenNMT/OpenNMT-py@3bd5190 (or any older one). It is being refactored for pytorch 0.4 right now, and I will update Seq2SeqVis once this is done.

For the server I think we need to add some fixes for the transformer, since it is not quite clear which attention we want to visualize.