Bug 1365375

Version-Release number of selected component (if applicable):
Dev_preview_PROD
OpenShift Master: v3.2.1.10-1-g668ed0a
Kubernetes Master: v1.2.0-36-g4a3f9c5

How reproducible:
Sometimes

Steps to Reproduce:
1. oc new-app https://github.com/openshift/nodejs-ex
2. Check the build process.

Actual results:
2. In dev_preview_PROD env, sometimes build would fail to push image to registry, some build logs are listed below:
...
I0809 02:01:45.667105       1 sti.go:334] Successfully built bingli-prod/nodejs-ex-4:4b18d114
I0809 02:01:45.697901       1 cleanup.go:23] Removing temporary directory /tmp/s2i-build339799339
I0809 02:01:45.697921       1 fs.go:156] Removing directory '/tmp/s2i-build339799339'
I0809 02:01:45.710856       1 sti.go:268] Using provided push secret for pushing 172.30.47.227:5000/bingli-prod/nodejs-ex:latest image
I0809 02:01:45.710877       1 sti.go:272] Pushing 172.30.47.227:5000/bingli-prod/nodejs-ex:latest image ...
I0809 02:02:15.839267       1 sti.go:277] Registry server Address: 
I0809 02:02:15.839292       1 sti.go:278] Registry server User Name: serviceaccount
I0809 02:02:15.839299       1 sti.go:279] Registry server Email: serviceaccount
I0809 02:02:15.839306       1 sti.go:284] Registry server Password: <<non-empty>>
F0809 02:02:15.839315       1 builder.go:204] Error: build error: Failed to push image. Response from registry is: Error parsing HTTP response: unexpected end of JSON input: ""


Additional info:
[user3@bingli ~]$ oc get build
NAME          TYPE      FROM          STATUS     STARTED          DURATION
nodejs-ex-1   Source    Git@0e748ed   Failed     26 minutes ago   1m1s
nodejs-ex-2   Source    Git@0e748ed   Failed     23 minutes ago   1m11s
nodejs-ex-3   Source    Git@0e748ed   Complete   14 minutes ago   2m26s
nodejs-ex-4   Source    Git@0e748ed   Failed     10 minutes ago   1m9s
[user3@bingli ~]$ oc get secret
NAME                       TYPE                                  DATA      AGE
builder-dockercfg-d4and    kubernetes.io/dockercfg               1         24d
builder-token-bas4d        kubernetes.io/service-account-token   3         24d
builder-token-tbhw7        kubernetes.io/service-account-token   3         24d
default-dockercfg-dm8j3    kubernetes.io/dockercfg               1         24d
default-token-fhqmy        kubernetes.io/service-account-token   3         24d
default-token-uwg2y        kubernetes.io/service-account-token   3         24d
deployer-dockercfg-1zw07   kubernetes.io/dockercfg               1         24d
deployer-token-p4cws       kubernetes.io/service-account-token   3         24d
deployer-token-v5xqh       kubernetes.io/service-account-token   3         24d
[user3@bingli ~]$ oc get bc nodejs-ex -o json
{
    "kind": "BuildConfig",
    "apiVersion": "v1",
    "metadata": {
        "name": "nodejs-ex",
        "namespace": "bingli-prod",
        "selfLink": "/oapi/v1/namespaces/bingli-prod/buildconfigs/nodejs-ex",
        "uid": "5af208b6-5df4-11e6-a1a5-0e3d364e19a5",
        "resourceVersion": "96695839",
        "creationTimestamp": "2016-08-09T05:44:36Z",
        "labels": {
            "app": "nodejs-ex"
        },
        "annotations": {
            "openshift.io/generated-by": "OpenShiftNewApp"
        }
    },
    "spec": {
        "triggers": [
            {
                "type": "GitHub",
                "github": {
                    "secret": "2Yi6C0MPUa_Ei_fo8d0d"
                }
            },
            {
                "type": "Generic",
                "generic": {
                    "secret": "ZUpbr3uIAjqDIwI5opyu"
                }
            },
            {
                "type": "ConfigChange"
            },
            {
                "type": "ImageChange",
                "imageChange": {
                    "lastTriggeredImageID": "registry.access.redhat.com/rhscl/nodejs-4-rhel7:latest"
                }
            }
        ],
        "runPolicy": "Serial",
        "source": {
            "type": "Git",
            "git": {
                "uri": "https://github.com/openshift/nodejs-ex"
            }
        },
        "strategy": {
            "type": "Source",
            "sourceStrategy": {
                "from": {
                    "kind": "ImageStreamTag",
                    "namespace": "openshift",
                    "name": "nodejs:4"
                }
            }
        },
        "output": {
            "to": {
                "kind": "ImageStreamTag",
                "name": "nodejs-ex:latest"
            }
        },
        "resources": {},
        "postCommit": {}
    },
    "status": {
        "lastVersion": 4
    }
}