[Bug]: LCB Service container is broken on mlcommon's container registry

[zihaok]

Bug Description

When I run this command, which is a srun ... --container-image=lcb_image_link, I couldn't get it to load properly

srun   --account=coreai_mlperf_inference   --partition=gb200   --job-name=coreai_mlperf_inference-lcb.enroot-zstd-repro   --nodes=1   --ntasks=1   --time=00:10:00   --segment=1   --container-image=ghcr.io/mlcommons/endpoints:598dbfde68ebfa42256762ebb60fd4da227b813c-livecodebench   bash -lc 'echo hello'
pyxis: importing docker image: ghcr.io/mlcommons/endpoints:598dbfde68ebfa42256762ebb60fd4da227b813c-livecodebench
[2026-08-24T23:56:56.408] error: pyxis: child 4023939 failed with error code: 4
[2026-08-24T23:56:56.408] error: pyxis: failed to import docker image: ghcr.io/mlcommons/endpoints:598dbfde68ebfa42256762ebb60fd4da227b813c-livecodebench
[2026-08-24T23:56:56.408] error: pyxis: printing enroot log file:
[2026-08-24T23:56:56.408] error: pyxis:     [INFO] Querying registry for permission grant
[2026-08-24T23:56:56.408] error: pyxis:     [INFO] Authenticating with user: <anonymous>
[2026-08-24T23:56:56.408] error: pyxis:     [INFO] Authentication succeeded
[2026-08-24T23:56:56.408] error: pyxis:     [INFO] Fetching image manifest list
[2026-08-24T23:56:56.408] error: pyxis:     [INFO] Fetching image manifest
[2026-08-24T23:56:56.408] error: pyxis:     [INFO] Downloading 14 missing layers...
[2026-08-24T23:56:56.408] error: pyxis:     [INFO] Extracting image layers...
[2026-08-24T23:56:56.408] error: pyxis:     tar: This does not look like a tar archive
[2026-08-24T23:56:56.408] error: pyxis:     tar: Skipping to next header
[2026-08-24T23:56:56.408] error: pyxis:     tar: Exiting with failure status due to previous errors
[2026-08-24T23:56:56.408] error: pyxis:     tar: This does not look like a tar archive
[2026-08-24T23:56:56.408] error: pyxis:     tar: Skipping to next header
[2026-08-24T23:56:56.408] error: pyxis:     tar: Exiting with failure status due to previous errors
[2026-08-24T23:56:56.408] error: pyxis:     tar: This does not look like a tar archive
[2026-08-24T23:56:56.408] error: pyxis:     tar: Skipping to next header
[2026-08-24T23:56:56.408] error: pyxis:     tar: Exiting with failure status due to previous errors
[2026-08-24T23:56:56.408] error: pyxis:     tar: This does not look like a tar archive
[2026-08-24T23:56:56.408] error: pyxis:     tar: Skipping to next header
[2026-08-24T23:56:56.408] error: pyxis:     tar: Exiting with failure status due to previous errors
[2026-08-24T23:56:56.408] error: spank: required plugin spank_pyxis.so: task_init() failed with rc=-1
[2026-08-24T23:56:56.408] error: Failed to invoke spank plugin stack
[2026-08-24T23:56:56.430] error: pyxis: child 4025632 failed with error code: 1
srun: error: lyris0162: task 0: Exited with exit code 1
srun: Terminating StepId=2782334.0

Steps to Reproduce

run this as minimum reproducer
srun --account=coreai_mlperf_inference --partition=gb200 --job-name=coreai_mlperf_inference-lcb.enroot-zstd-repro --nodes=1 --ntasks=1 --time=00:10:00 --segment=1 --container-image=ghcr.io/mlcommons/endpoints:598dbfde68ebfa42256762ebb60fd4da227b813c-livecodebench bash -lc 'echo hello'

Environment

N/A

Relevant Logs

N/A

Before submitting

• I searched existing issues and found no duplicates