Dataloader Error: AttributeError: 'NoneType' object has no attribute 'Pool'

Hi Team,

I get the error “AttributeError: ‘NoneType’ object has no attribute ‘Pool’” after my training loop completes and before exiting the program in SageMaker.
My mxnet version is:
(mxnet_p36) sh-4.2$ pip list|grep mxnet
aws-mxnet-cu101mkl 1.6.0
keras-mxnet 2.2.4.2
mxnet-model-server 1.0.8

The training finishes successfully but the program fails to exit.
Here is the detailed error:

Exception ignored in: <bound method DataLoader.del of <mxnet.gluon.data.dataloader.DataLoader object at 0x7f45a99f9208>>
Traceback (most recent call last):
File “/home/ec2-user/anaconda3/envs/mxnet_p36/lib/python3.6/site-packages/mxnet/gluon/data/dataloader.py”, line 678, in del
AttributeError: ‘NoneType’ object has no attribute ‘Pool’

Any thoughts on how I can debug this?
Thanks!

Having the same issue. Any ideas?

haveing the same issue too

Since my last update today me too.

I’m using mxnet 1.9.1

Is there any solution to fix it?