UserWarning: Converting sparse IndexedSlices(IndexedSlices(indices=Tensor("gradients/cond_2_grad/Identity_1:0", shape=(None,), dtype=int64), values=Tensor("gradients/cond_2_grad/Identity:0", shape=(None,), dtype=float32), dense_shape=Tensor("gradients/cond_2_grad/Identity_2:0", shape=(1,), dtype=int32))) to a dense Tensor of unknown shape. This may consume a large amount of memory.
How much should I be worried about this?