datahub的公网地址http://dh-cn-hangzhou.aliyuncs.com用不了

Exception in thread "main" com.aliyun.datahub.exception.DatahubServiceException: The specified uri spec is not valid. (Status Code: 400; Error Code: InvalidUriSpec; Request ID: 2017060709581097b99a0a615713b5)

at com.aliyun.datahub.model.serialize.JsonErrorParser.parse(JsonErrorParser.java:54)
at com.aliyun.datahub.model.serialize.CreateTopicResultJsonDeser.deserialize(CreateTopicResultJsonDeser.java:14)
at com.aliyun.datahub.model.serialize.CreateTopicResultJsonDeser.deserialize(CreateTopicResultJsonDeser.java:9)
at com.aliyun.datahub.DatahubClient.createTopic(DatahubClient.java:297)
at com.aliyun.datahub.DatahubClient.createTopic(DatahubClient.java:235)
at com.iflytek.hmwang.DatahubDemo.main(DatahubDemo.java:41)