Log message "There are invalid params and some of them will be ignored."

[mazurkin]

Problem: some strange messages in the logs
catboost version: 0.26.1
Operating System: Linux

I still see the messages in the logs, using catboost for java 0.26.1 for prediction, and catboost for python 0.26.1 to train the model (with feature_weights parameter in CatBoostRegressor).

There are invalid params and some of them will be ignored.
Parameter {"feature_weights":[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0.1,0.1,0.1,0.1,0.1,0.1,0.1]} is ignored, because it cannot be parsed.

Probably related tickets:
#873
#1169