Gradient Boosted Trees: stopped before building all trees
I'm using Gradient Boosted Trees to build a binary classifier with ~500 features. I want to increase the number of trees during training to get better feature weights, however, if i set the number of trees > 1000, the training stops before building all trees with no reason (as in the log panel - sceenshot attached - it stopped at 43%). This is not the memory problem as i noticed the memory usage is only 27%. I didn't tick the "early stopping" checkbox.
Do you know the true reason behind this, or is there another way to increase the reliability of feature weights? I attached the process here, let me know if you want the data.
Thank you very much for your help!