Pushing container hangs after upload completes

[agitter]

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I am following the instructions at https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#pushing-container-images to login to the container registry and then push a Docker image. The login appears to work with a classic token. Many layers are pushed. Then, everything hangs for 10s of minutes.

I also tried pushing an Apptainer .sif file by adapting the instructions to use oras://ghcr.io and experience the same thing. There is a progress bar that reaches 100% upload progress, and then it gets stuck.

What could this indicate? I made a new token and verified it has write:packages enabled.

[agitter]

I tried this again with a smaller Apptainer container and it worked

$ apptainer push allpairs:latest oras://ghcr.io/agitter/allpairs:latest
24.1MiB / 24.1MiB [=========================================================================================] 100 % 26.1 MiB/s 0s
INFO:    Upload complete

This suggests that the authentication is okay, and I am running the correct command. However, my original container still fails. The push will hang for hours

$ apptainer push bindcraft:v1.0.0 oras://ghcr.io/agitter/bindcraft:v1.0.0
7.8GiB / 7.8GiB [==========================================================================================] 100 % 138.7 MiB/s 0s

Besides the container size, I'm not sure what is different.