kubernetes tracker meeting Empty domain

[jzp1025]

Hi ! I'm trying to use dmlc-submit to submit a kubernetes job , and i meet the bug following:

To check each log, try 'kubectl logs job/{{role}}-{{jobname}}-{{workerID}}'
Traceback (most recent call last):
  File "./dmlc-submit", line 9, in <module>
    submit.main()
  File "/home/tusimple/incubator-mxnet/3rdparty/dmlc-core/tracker/dmlc_tracker/submit.py", line 54, in main
    kubernetes.submit(args)
  File "/home/tusimple/incubator-mxnet/3rdparty/dmlc-core/tracker/dmlc_tracker/kubernetes.py", line 143, in submit
    pscmd="echo \"To check each log, try 'kubectl logs job/{{role}}-{{jobname}}-{{workerID}}'\"")
  File "/home/tusimple/incubator-mxnet/3rdparty/dmlc-core/tracker/dmlc_tracker/tracker.py", line 428, in submit
    fun_submit(nworker, nserver, envs)
  File "/home/tusimple/incubator-mxnet/3rdparty/dmlc-core/tracker/dmlc_tracker/kubernetes.py", line 129, in kubernetes_submit
    resp = k8s_batch.create_namespaced_job(namespace=args.kube_namespace, body=mn_sh_job)
  File "build/bdist.linux-x86_64/egg/kubernetes/client/apis/batch_v1_api.py", line 58, in create_namespaced_job
  File "build/bdist.linux-x86_64/egg/kubernetes/client/apis/batch_v1_api.py", line 143, in create_namespaced_job_with_http_info
  File "build/bdist.linux-x86_64/egg/kubernetes/client/api_client.py", line 321, in call_api
  File "build/bdist.linux-x86_64/egg/kubernetes/client/api_client.py", line 155, in __call_api
  File "build/bdist.linux-x86_64/egg/kubernetes/client/api_client.py", line 364, in request
  File "build/bdist.linux-x86_64/egg/kubernetes/client/rest.py", line 266, in POST
  File "build/bdist.linux-x86_64/egg/kubernetes/client/rest.py", line 166, in request
  File "/usr/local/lib/python2.7/dist-packages/urllib3/request.py", line 72, in request
    **urlopen_kw)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/request.py", line 150, in request_encode_body
    return self.urlopen(method, url, **extra_kw)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/poolmanager.py", line 322, in urlopen
    response = conn.urlopen(method, u.request_uri, **kw)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 343, in _make_request
    self._validate_conn(conn)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/connectionpool.py", line 849, in _validate_conn
    conn.connect()
  File "/usr/local/lib/python2.7/dist-packages/urllib3/connection.py", line 367, in connect
    cert = self.sock.getpeercert()
  File "/usr/local/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 351, in getpeercert
    'subjectAltName': get_subj_alt_name(x509)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 228, in get_subj_alt_name
    for name in ext.get_values_for_type(x509.DNSName)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 181, in _dnsname_to_stdlib
    name = idna_encode(name)
  File "/usr/local/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 179, in idna_encode
    return idna.encode(name)
  File "/usr/local/lib/python2.7/dist-packages/idna/core.py", line 350, in encode
    raise IDNAError('Empty domain')
idna.core.IDNAError: Empty domain

i'm using the command below:

./dmlc-submit     --cluster kubernetes     --jobname test     --num-workers 
3     --num-server 1     --kube-worker-image jzp1025/mxnet:test     --kube-server-image jzp1025/mxnet:test     python /incubator-mxnet/example/image-classification/train_mnist.py --network=resnet --num-layers=110 --batch-size=128 --kv-store=dist_device_sync

looking for some help , thanks !