数据同步 - C#调用java的接口有时候接口没有返回信息

Question

这个同步数据的程序大致流程是

• 1.C#调用java接口往数据库里插入数据

• 2.java程序返回给C#程序一个是否插入成功的json数据

其实就是一来一回，我是写这个java接口的人，C#程序我不熟，但是写C#程序的哥们在程序里判断，如果我服务器没有返回内容，就会再次执行上一条数据的插入操作

我有几个疑问

• 1.我又没关服务器，怎么可能什么东西都不返回给C#程序？例如tomcat只要没关肯定会返回状态码，无论是200还是500还是404

• 2.C#的哥们说他程序写的肯定没问题，也不愿意共享源码，于是我在我的Controller里做了一个日志记录，记录每次插入操作耗时，以及response里的内容，发现每次response都是有数据的

• 3.我现在该如何排错呢？我能想到的就是去C#程序的电脑上用fiddler抓包，看看到底是不是我服务器没返回给他程序response，不知大家有什么更好的快速定位办法，或者说我们两个程序都没问题，是机房网络有问题。

谢谢

Answer 1

This is obviously his problem. As long as the connection is successful, there will definitely be a status, at least there will be an http header.
If there is nothing, there is either a problem with his code or a network problem.
But no matter what, he must consider this possibility and make fault tolerance.

The interface is a passive service, what else can be done? Free shipping~~~

Answer 2

The person above is right, there is a problem with C#. Use wireshark to capture the packets on the C# program and it will be clear.
Fiddler seems to be unable to capture the program socket link. Fiddler can only capture http.