Unexpected synchronization error with a remote repository

Start by reproducing the reported setup with the pulp python remote create, repository update, and repository sync commands, testing the listed mirror URL variants. Read the related pulp_python issue 868 and compare the sync behavior and error details. Done means identifying the cause and documenting or implementing a confirmed way to synchronize the selected distro packages from the mirror.

Version

  {
    "component": "core",
    "version": "3.83.2",
    "package": "pulpcore",
    "module": "pulpcore.app",
    "domain_compatible": true
  },
  {
    "component": "python",
    "version": "3.17.0",
    "package": "pulp-python",
    "module": "pulp_python.app",
    "domain_compatible": true
  }

Describe the bug
hello! I want to try to use your project, but I'm facing a problem...
I added:

[
  {
    "pulp_href": "/pulp/api/v3/repositories/python/python/01985ca2-f970-7825-a3f8-122610f262a3/",
    "prn": "prn:python.pythonrepository:01985ca2-f970-7825-a3f8-122610f262a3",
    "pulp_created": "2025-07-30T18:40:41.329775Z",
    "pulp_last_updated": "2025-07-31T08:49:44.630701Z",
    "versions_href": "/pulp/api/v3/repositories/python/python/01985ca2-f970-7825-a3f8-122610f262a3/versions/",
    "pulp_labels": {},
    "latest_version_href": "/pulp/api/v3/repositories/python/python/01985ca2-f970-7825-a3f8-122610f262a3/versions/1/",
    "name": "distro_local",
    "description": null,
    "retain_repo_versions": null,
    "remote": null,
    "autopublish": false
  }
]

remote:

[
  {
    "pulp_href": "/pulp/api/v3/remotes/python/python/01985fcc-9589-7a26-94f7-9c1601fd8fb8/",
    "prn": "prn:python.pythonremote:01985fcc-9589-7a26-94f7-9c1601fd8fb8",
    "pulp_created": "2025-07-31T09:24:59.914051Z",
    "pulp_last_updated": "2025-07-31T09:24:59.914073Z",
    "name": "test-remote",
    "url": "https://mirrors.aliyun.com/pypi",
    "ca_cert": null,
    "client_cert": null,
    "tls_validation": true,
    "proxy_url": null,
    "pulp_labels": {},
    "download_concurrency": null,
    "max_retries": null,
    "policy": "immediate",
    "total_timeout": null,
    "connect_timeout": null,
    "sock_connect_timeout": null,
    "sock_read_timeout": null,
    "headers": null,
    "rate_limit": null,
    "hidden_fields": [
      {
        "name": "client_key",
        "is_set": false
      },
      {
        "name": "proxy_username",
        "is_set": false
      },
      {
        "name": "proxy_password",
        "is_set": false
      },
      {
        "name": "username",
        "is_set": false
      },
      {
        "name": "password",
        "is_set": false
      }
    ],
    "includes": [
      "distro"
    ],
    "excludes": [],
    "prereleases": true,
    "package_types": [],
    "keep_latest_packages": 0,
    "exclude_platforms": []
  }
]

But I still couldn't get the packets to sync...

I came across a topic: https://github.com/pulp/pulp_python/issues/868

I assumed that these were interrelated issues. Can you confirm this? I used several options:

• https://mirrors.aliyun.com/pypi
• https://mirrors.aliyun.com/pypi/
• https://mirrors.aliyun.com/pypi/simple

But I still couldn't synchronize the packages. Can you suggest a solution? pypi.org it's not available on my network, I can't use it.

At the same time, I clarified: "the mirror https://mirrors.aliyun.com/pypi/simple / fully supports the same Simple Repository API as the official PyPI "

To Reproduce

pulp python remote create   --name test-remote   --url https://mirrors.aliyun.com/pypi/   --includes '["distro"]'   --policy immediate

pulp python repository update   --name distro_local   --remote test-remote

pulp python repository sync --name distro_local

Expected behavior
I was waiting for the synchronization of packages