Check return value of http.ListenAndServe (#21)
Check return value of http.ListenAndServe (#21)

Signed-off-by: terrytangyuan <d8ac0cc877bd3769c2dd518dc06d4a6a6b610403@gmail.com>
kubeflow/metadata,kubeflow/metadata,kubeflow/metadata,kubeflow/metadata,kubeflow/metadata,kubeflow/metadata