android - Google App Engine 示例应用抛出 503

Question

我已经从 this tutorial 设置了 Google 应用引擎的示例安卓

当我在 EditText 中输入内容并按下发送按钮时，有一段时间没有任何反应并抛出以下错误

06-10 18:47:49.109: I/CloudBackend(28741): error: 
06-10 18:47:49.109: I/CloudBackend(28741): com.google.api.client.googleapis.json.GoogleJsonResponseException: 503 Service Unavailable
06-10 18:47:49.109: I/CloudBackend(28741): {
06-10 18:47:49.109: I/CloudBackend(28741):   "code": 503,
06-10 18:47:49.109: I/CloudBackend(28741):   "errors": [
06-10 18:47:49.109: I/CloudBackend(28741):     {
06-10 18:47:49.109: I/CloudBackend(28741):       "domain": "global",
06-10 18:47:49.109: I/CloudBackend(28741):       "message": "",
06-10 18:47:49.109: I/CloudBackend(28741):       "reason": "backendError"
06-10 18:47:49.109: I/CloudBackend(28741):     }
06-10 18:47:49.109: I/CloudBackend(28741):   ],
06-10 18:47:49.109: I/CloudBackend(28741):   "message": ""
06-10 18:47:49.109: I/CloudBackend(28741): }
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:111)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:38)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.api.client.googleapis.services.AbstractGoogleClientRequest$1.interceptResponse(AbstractGoogleClientRequest.java:314)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1060)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:412)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:345)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:463)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.cloud.backend.android.CloudBackend.insert(CloudBackend.java:111)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.cloud.backend.android.CloudBackendAsync.access$0(CloudBackendAsync.java:1)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.cloud.backend.android.CloudBackendAsync$1.callBackend(CloudBackendAsync.java:87)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.cloud.backend.android.CloudBackendAsync$1.callBackend(CloudBackendAsync.java:1)
06-10 18:47:49.109: I/CloudBackend(28741):  at com.google.cloud.backend.android.CloudBackendAsync$BackendCaller.run(CloudBackendAsync.java:428)

消息是“”，很烦人!P.S:我是谷歌应用引擎的新手。

Answer 1

可能是数据转换错误。服务器期望一种格式的值，而客户端以其他格式发送(谷歌云端点中的解析层问题)。我强烈建议您首先使用 google 的 api explorer 工具来验证您的服务器端接口(interface)是否正常工作。然后你应该继续找出客户端的任何问题。