实现Thrift API时出错(Error implementing the Thrift API)

 我正在用Java实现Thrift Remote Procedure调用框架。 我设置了thrift并生成了我的框架代码而没有太多问题，但是现在我实际上在使用API​​方法，我得到了奇怪的错误。 
 
 以下是我得到的错误： 
 
Exception in thread "main" org.apache.thrift.transport.TTransportException: Cannot write to null outputStream
at org.apache.thrift.transport.TIOStreamTransport.write(TIOStreamTransport.java:142)
at org.apache.thrift.protocol.TBinaryProtocol.writeI32(TBinaryProtocol.java:163)
at org.apache.thrift.protocol.TBinaryProtocol.writeMessageBegin(TBinaryProtocol.java:91)
at SimonSays$Client.send_registerClient(SimonSays.java:102)
at SimonSays$Client.registerClient(SimonSays.java:96)
at simon.main(testClass.java:16)
 
 我不认为我没有犯任何错误，但只是为了确保，这是导致错误的代码： 
 
TProtocol prot = new TBinaryProtocol(new TSocket("http://thriftpuzzle.facebook.com",9030));
    SimonSays.Client client = new SimonSays.Client(prot);

    client.registerClient("userEmailAddress@gmail.com");
 
 该错误据说是从client.registerClient()调用生成的，但这是对Thrift生成的代码的调用，这让我觉得我在设置连接本身时做错了。 
 
 关于制作TProtocol实例的部分我自己也包括在内，这可能就是问题所在。 
 
 我希望有人能更多地了解我做错了什么。 
 
 如果需要更多信息或说明，请告诉我。 
 
 编辑：我从Cassandra Wiki找到了TProtocol实例化语句 

I'm implementing the Thrift Remote Procedure call framework in Java. I set up thrift and generated my skeleton code without a lot of issues, but now that I'm actually using the API methods, I get strange errors. 
 
Here are the errors I get: 
 
Exception in thread "main" org.apache.thrift.transport.TTransportException: Cannot write to null outputStream
at org.apache.thrift.transport.TIOStreamTransport.write(TIOStreamTransport.java:142)
at org.apache.thrift.protocol.TBinaryProtocol.writeI32(TBinaryProtocol.java:163)
at org.apache.thrift.protocol.TBinaryProtocol.writeMessageBegin(TBinaryProtocol.java:91)
at SimonSays$Client.send_registerClient(SimonSays.java:102)
at SimonSays$Client.registerClient(SimonSays.java:96)
at simon.main(testClass.java:16)
 
I don't think I'm not making any mistakes, but just to make sure, here's the code that's leading to the errors: 
 
TProtocol prot = new TBinaryProtocol(new TSocket("http://thriftpuzzle.facebook.com",9030));
    SimonSays.Client client = new SimonSays.Client(prot);

    client.registerClient("userEmailAddress@gmail.com");
 
The error is said to be generated from the client.registerClient() call, but that is a call to the code generated by Thrift, which makes me feel that I'm doing something wrong in setting up the connection itself. 
 
The part about making a TProtocol instance I included myself, and it's likely that that's where the problem lies. 
 
I was hoping that someone would have more of an idea about what's going wrong that I do.
 
Please let me know if more information or clarification is needed. 
 
Edit: I found the TProtocol instantiation statement from the Cassandra Wiki