When use the command `oc-mirror list operators --catalog=registry.redhat.io/redhat/certified-operator-index:v4.12 -v 9` , at begging the response code is 200 okay , when the command will hang for a while , then will got response code 401.
This also appears when mirroring several operator catalogs on a slow network, or from a machine with de-synchronized time.

sometimes

A- Using the advanced cluster management package as an example.

1. oc-mirror list operators --catalog=registry.redhat.io/redhat/certified-operator-index:v4.12 -v 9

B- Performing a mirroring with several catalogs
cat ocpbugs-7465.yaml
kind: ImageSetConfiguration
apiVersion: mirror.openshift.io/v1alpha2
mirror:
  operators:
  - catalog: registry.redhat.io/redhat/redhat-operator-index:v4.11
    packages:
    - name: openshift-gitops-operator
      channels:
      - name: latest
    - name: openshift-pipelines-operator-rh
      channels:
      - name: latest
    - name: cincinnati-operator
      channels:
      - name: v1
    - name: cluster-logging
      channels:
      - name: stable
    - name: metallb-operator
      channels:
      - name: stable
    - name: compliance-operator
      channels:
      - name: stable
  - catalog: registry.redhat.io/redhat/certified-operator-index:v4.11
    packages:
    - name: nutanixcsioperator
      channels:
      - name: stable
  - catalog: registry.redhat.io/redhat/redhat-operator-index:v4.12
    packages:
    - name: openshift-gitops-operator
      channels:
      - name: latest
    - name: openshift-pipelines-operator-rh
      channels:
      - name: latest
    - name: cincinnati-operator
      channels:
      - name: v1
    - name: cluster-logging
      channels:
      - name: stable
    - name: metallb-operator
      channels:
      - name: stable
    - name: compliance-operator
      channels:
      - name: stable
  - catalog: registry.redhat.io/redhat/certified-operator-index:v4.12
    packages:
    - name: nutanixcsioperator
      channels:
      - name: stable
./bin/oc-mirror -c ocpbugs-7465.yaml file:///home/user1234/ocpbugs-7465 -v 9 

level=debug msg=fetch response received digest=sha256:a67257cfe913ad09242bf98c44f2330ec7e8261ca3a8db3431cb88158c3d4837 mediatype=application/vnd.docker.image.rootfs.diff.tar.gzip response.header.accept-ranges=bytes response.header.age=714959 response.header.connection=keep-alive response.header.content-length=80847073 response.header.content-type=binary/octet-stream response.header.date=Mon, 06 Feb 2023 06:52:06 GMT response.header.etag="a428fafd37ee58f4bdeae1a7ff7235b5-1" response.header.last-modified=Fri, 16 Sep 2022 17:54:09 GMT response.header.server=AmazonS3 response.header.via=1.1 010c0731b9775a983eceaec0f5fa6a2e.cloudfront.net (CloudFront) response.header.x-amz-cf-id=rEfKWnJdasWIKnjWhYyqFn9eHY8v_3Y9WwSRnnkMTkPayHlBxWX1EQ== response.header.x-amz-cf-pop=HIO50-C1 response.header.x-amz-replication-status=COMPLETED response.header.x-amz-server-side-encryption=AES256 response.header.x-amz-storage-class=INTELLIGENT_TIERING response.header.x-amz-version-id=GfqTTjWbdqB0sreyjv3fyo1k6LQ9kZKC response.header.x-cache=Hit from cloudfront response.status=200 OK size=80847073 url=https://registry.redhat.io/v2/redhat/certified-operator-index/blobs/sha256:a67257cfe913ad09242bf98c44f2330ec7e8261ca3a8db3431cb88158c3d4837
level=debug msg=fetch response received digest=sha256:d242c7b4380d3c9db3ac75680c35f5c23639a388ad9313f263d13af39a9c8b8b mediatype=application/vnd.docker.image.rootfs.diff.tar.gzip response.header.accept-ranges=bytes response.header.age=595868 response.header.connection=keep-alive response.header.content-length=98028196 response.header.content-type=binary/octet-stream response.header.date=Tue, 07 Feb 2023 15:56:56 GMT response.header.etag="f702c84459b479088565e4048a890617-1" response.header.last-modified=Wed, 18 Jan 2023 06:55:12 GMT response.header.server=AmazonS3 response.header.via=1.1 7f5e0d3b9ea85d0d75063a66c0ebc840.cloudfront.net (CloudFront) response.header.x-amz-cf-id=Tw9cjJjYCy8idBiQ1PvljDkhAoEDEzuDCNnX6xJub4hGeh8V0CIP_A== response.header.x-amz-cf-pop=HIO50-C1 response.header.x-amz-replication-status=COMPLETED response.header.x-amz-server-side-encryption=AES256 response.header.x-amz-storage-class=INTELLIGENT_TIERING response.header.x-amz-version-id=nt7yY.YmjWF0pfAhzh_fH2xI_563GnPz response.header.x-cache=Hit from cloudfront response.status=200 OK size=98028196 url=https://registry.redhat.io/v2/redhat/certified-operator-index/blobs/sha256:d242c7b4380d3c9db3ac75680c35f5c23639a388ad9313f263d13af39a9c8b8b
level=debug msg=fetch response received digest=sha256:664a8226a152ea0f1078a417f2ec72d3a8f9971e8a374859b486b60049af9f18 mediatype=application/vnd.docker.container.image.v1+json response.header.accept-ranges=bytes response.header.age=17430 response.header.connection=keep-alive response.header.content-length=24828 response.header.content-type=binary/octet-stream response.header.date=Tue, 14 Feb 2023 08:37:35 GMT response.header.etag="57eb6fdca8ce82a837bdc2cebadc3c7b-1" response.header.last-modified=Mon, 13 Feb 2023 16:11:57 GMT response.header.server=AmazonS3 response.header.via=1.1 0c96ded7ff282d2dbcf47c918b6bb500.cloudfront.net (CloudFront) response.header.x-amz-cf-id=w9zLDWvPJ__xbTpI8ba5r9DRsFXbvZ9rSx5iksG7lFAjWIthuokOsA== response.header.x-amz-cf-pop=HIO50-C1 response.header.x-amz-replication-status=COMPLETED response.header.x-amz-server-side-encryption=AES256 response.header.x-amz-version-id=Enw8mLebn4.ShSajtLqdo4riTDHnVEFZ response.header.x-cache=Hit from cloudfront response.status=200 OK size=24828 url=https://registry.redhat.io/v2/redhat/certified-operator-index/blobs/sha256:664a8226a152ea0f1078a417f2ec72d3a8f9971e8a374859b486b60049af9f18
level=debug msg=fetch response received digest=sha256:130c9d0ca92e54f59b68c4debc5b463674ff9555be1f319f81ca2f23e22de16f mediatype=application/vnd.docker.image.rootfs.diff.tar.gzip response.header.accept-ranges=bytes response.header.age=829779 response.header.connection=keep-alive response.header.content-length=26039246 response.header.content-type=binary/octet-stream response.header.date=Sat, 04 Feb 2023 22:58:25 GMT response.header.etag="a08688b701b31515c6861c69e4d87ebd-1" response.header.last-modified=Tue, 06 Dec 2022 20:50:51 GMT response.header.server=AmazonS3 response.header.via=1.1 000f4a2f631bace380a0afa747a82482.cloudfront.net (CloudFront) response.header.x-amz-cf-id=S-h31zheAEOhOs6uH52Rpq0ZnoRRdd5VfaqVbZWXzAX-Zym-0XtuKA== response.header.x-amz-cf-pop=HIO50-C1 response.header.x-amz-replication-status=COMPLETED response.header.x-amz-server-side-encryption=AES256 response.header.x-amz-storage-class=INTELLIGENT_TIERING response.header.x-amz-version-id=BQOjon.COXTTON_j20wZbWWoDEmGy1__ response.header.x-cache=Hit from cloudfront response.status=200 OK size=26039246 url=https://registry.redhat.io/v2/redhat/certified-operator-index/blobs/sha256:130c9d0ca92e54f59b68c4debc5b463674ff9555be1f319f81ca2f23e22de16f




level=debug msg=do request digest=sha256:db8e9d2f583af66157f383f9ec3628b05fa0adb0d837269bc9f89332c65939b9 mediatype=application/vnd.docker.image.rootfs.diff.tar.gzip request.header.accept=application/vnd.docker.image.rootfs.diff.tar.gzip, */* request.header.range=bytes=13417268- request.header.user-agent=opm/alpha request.method=GET size=91700480 url=https://registry.redhat.io/v2/redhat/certified-operator-index/blobs/sha256:db8e9d2f583af66157f383f9ec3628b05fa0adb0d837269bc9f89332c65939b9
level=debug msg=fetch response received digest=sha256:db8e9d2f583af66157f383f9ec3628b05fa0adb0d837269bc9f89332c65939b9 mediatype=application/vnd.docker.image.rootfs.diff.tar.gzip response.header.cache-control=max-age=0, no-cache, no-store response.header.connection=keep-alive response.header.content-length=99 response.header.content-type=application/json response.header.date=Tue, 14 Feb 2023 13:34:06 GMT response.header.docker-distribution-api-version=registry/2.0 response.header.expires=Tue, 14 Feb 2023 13:34:06 GMT response.header.pragma=no-cache response.header.registry-proxy-request-id=0d7ea55f-e96d-4311-885a-125b32c8e965 response.header.www-authenticate=Bearer realm="https://registry.redhat.io/auth/realms/rhcc/protocol/redhat-docker-v2/auth",service="docker-registry",scope="repository:redhat/certified-operator-index:pull" response.status=401 Unauthorized size=91700480 url=https://registry.redhat.io/v2/redhat/certified-operator-index/blobs/sha256:db8e9d2f583af66157f383f9ec3628b05fa0adb0d837269bc9f89332c65939b9.

error: error rendering new refs: render reference "registry.redhat.io/redhat/redhat-operator-index:v4.12": error resolving name for image ref registry.redhat.io/redhat/redhat-operator-index:v4.12: pulling from host registry.redhat.io failed with status code [manifests v4.12]: 401 Unauthorized

Should always read the credentials for the command .