Particular retrieved model fails with proto descriptor error

[saum7800]

When trying a particular task, the model retriever retrieved this model: mrm8488/t5-base-finetuned-common_gen.

Just before training could start, p2m crashed with the following error log:

TypeError: Couldn't build proto file into descriptor pool!
Invalid proto descriptor for file "sentencepiece_model.proto":
  sentencepiece_model.proto: A file with this name is already in the pool.

After searching for other people facing this issue, I found the following 3 links:
protocolbuffers/protobuf#12882
ValvePython/csgo#8 (comment)
protocolbuffers/protobuf#3002 (comment)

It seems during installation, we would need a user to install protobuf with

pip install --no-binary protobuf protobuf

Not sure what a cleaner way to do it would be.

[neubig]

I'm not sure how common this particular error is (I've never encountered it myself), so maybe we don't need to deal with it specifically. It would be good if we have a mechanism to fall back to the next model in the retrieved model list if one fails for an edge case like this.

[saum7800]

yeah I think a fall back mechanism makes sense