The sample code cannot run

[Qiangqiang-Zhu]

Hello.
When I ran the sample code in this Readme, there was always "MXNetError: vector::_M_range_insert
" errors.

[lostella]

@1670811876 can you add a few details about your setup? What version of gluonts and mxnet are you using?

[thatdanghill]

I saw this error as well on Ubuntu when trying to iterate through forecasts for a DeepAR model.
My gluonts version was 0.4.2 and mxnet was 1.5.1.post0.
I patched it by rolling back mxnet from 1.5.1.post0 to 1.4.1 and pyarrow from 0.16.0 to 0.10.0.

I ran the same code on my macOS without any errors. My hunch is that the difference is my Linux machine has a GPU and has CUDA installed, although the models aren't using the GPU (I see INFO:root:Using CPU).

Update: I have configured Gluon to use the GPU, and I still need mxnet-cu100 1.4.1 and pyarrow 0.10.0.

[lostella]

The problem is with mxnet-1.5.x I believe: there is a bug there that prevents sampling operators from working correctly on Linux, see apache/mxnet#16135

We look forward to mxnet-1.6 being released to solve issue. For now, I think sticking with mxnet-1.4.1 is the solution.