我正试图使用PayPal Sandbox测试自动信用卡处理，但遇到了问题。当我的收费金额为$105时，我会得到一个调试id为de753957a889d的INTERNAL_SERVICE_ERROR。例如，如果我返回并将金额更改为$115之类的其他金额，则费用会按预期进行。我尝试了几种不同的金额，105美元似乎是唯一一个给我带来错误的金额。
以下是日志文件中的行：
2013-08-27 12:45:36,570 [10] DEBUG PayPal.Manager.ConnectionManager [(null)] grant_type=client_credentials
2013-08-27 12:45:37,376 [10] DEBUG PayPal.Manager.ConnectionManager [(null)] Service response
2013-08-27 12:45:37,376 [10] DEBUG PayPal.Manager.ConnectionManager [(null)] {"scope":"htts://api.paypal.com/v1/payments/.* htts://api.paypal.com/v1/vault/credit-card htts://api.paypal.com/v1/vault/credit-card/.* openid","access_token":"BJ7.168BhK3u0EgZ.MQgUABpdnTropRiXdCQ7ALrBHg","token_type":"Bearer","app_id":"APP-80W284485P519543T","expires_in":28800}
2013-08-27 12:45:37,698 [10] DEBUG PayPal.PayPalResource [(null)] Content-Type:application/json
2013-08-27 12:45:37,698 [10] DEBUG PayPal.PayPalResource [(null)] Authorization:Bearer BJ7.168BhK3u0EgZ.MQgUABpdnTropRiXdCQ7ALrBHg
2013-08-27 12:45:37,698 [10] DEBUG PayPal.PayPalResource [(null)] User-Agent:PayPalSDK/rest-sdk-dotnet 0.7.3 ;lang=DOTNET;v=4.0.30319.1008;bit=64;os=Windows 7 6.1.7601.65536;
2013-08-27 12:45:37,698 [10] DEBUG PayPal.PayPalResource [(null)] PayPal-Request-Id:14504bda-98c3-4b14-90fd-083663e80bfd
2013-08-27 12:45:37,789 [10] DEBUG PayPal.Manager.ConnectionManager [(null)] {"intent":"sale","payer":{"payment_method":"credit_card","funding_instruments":[{"credit_card":{"number":"4417119669820331","type":"visa","expire_month":3,"expire_year":2015,"cvv2":"123","first_name":"David","last_name":"Krejci","billing_address":{"line1":"300 Technology Square","city":"Cambridge","country_code":"US","postal_code":"02139","state":"MA"}}}]},"transactions":[{"amount":{"currency":"USD","total":"105","details":{"shipping":"0","subtotal":"105","tax":"0"}},"description":"B4M Reg"}]}
2013-08-27 12:45:42,975 [10] ERROR PayPal.Manager.ConnectionManager [(null)] Error Response: {"name":"INTERNAL_SERVICE_ERROR","message":"An internal service error has occurred","information_link":"htts://developer.paypal.com/webapps/developer/docs/api/#INTERNAL_SERVICE_ERROR","debug_id":"de753957a889d"}
2013-08-27 12:45:42,976 [10] INFO PayPal.Manager.ConnectionManager [(null)] Got InternalServerError status code from server
2013-08-27 12:45:43,035 [10] ERROR PayPal.Exception.PayPalException [(null)] Exception in HttpConnection Execute: Stream was not readable.
PayPal.Exception.PayPalException: Exception in HttpConnection Execute: Stream was not readable. ---> System.ArgumentException: Stream was not readable.
at System.IO.StreamReader..ctor(Stream stream, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize)
at System.IO.StreamReader..ctor(Stream stream)
at PayPal.HttpConnection.Execute(String payLoad, HttpWebRequest httpRequest)
--- End of inner exception stack trace ---
您的沙箱帐户上是否启用了"阴性测试"
https://developer.paypal.com/>应用程序>沙盒帐户>查找您的帐户>单击"配置文件">设置。
负测试允许您通过将特定错误代码作为"AMT"值传递来触发特定错误代码，从而测试我们经典API的特定错误条件
例如，对于API错误代码12345，可以设置AMT=123.45
对于您的错误场景，我看到我们内部返回API错误代码10500。这让我强烈怀疑你的一个沙箱账户开启了"阴性测试"。
如果您多次使用相同的卡详细信息，则可能会出现此问题。请使用不同的卡，您将不会收到此类问题。