Image pull from internal registry failing with "500 Internal server Error" in RHOCP4

Issue

• Pod failing with ImagePullBackOff when deployment configured with internal image url. Same deployment is working fine when upstream registry url is used.

Back-off pulling image "image-registry.openshift-image-registry.svc:5000/<repo>/<image>:<tag>"

• Manual image pull failing with below error:

error: initializing source docker://image-registry. openshift-image-registry.svc: 5000/<repo>/<image>:<tag>: reading manifest <tag> in image-registry.openshift-image-registry.svc:5000/<repo>/<image>:<tag>: received unexpected HTTP status: 500 Internal server Error

• Observed below error in image-registry pod:

level=error msg="response completed with error" err.code=unknown err.detail="unexpected end of JSON input" err.message="unknown error"