RabbitMQ路由行为(RabbitMQ routing behavior)

 
 
 当应用程序在Android设备上运行时，我逐步执行代码，但异常发生在不属于应用程序的代码中 
 
 
 正如您所做的那样，在调试器中逐行逐步执行应用程序代码，直到您到达抛出异常之前运行的最后一行。 
 
 在这一行，你会找到一个外部库的调用。 你说你没有这个库的来源。 这是不幸的，但这不是结束。 
 
 最简单的后续步骤来自于意识到您的异常很可能是由以下两种情况之一引起的： 
 
 1）您正在以不被设计使用的方式使用外部库。 例如，向它提供一些不良数据，不按顺序使用其功能，或者只是以错误的方式。 阅读文档并尝试了解这是否是问题所在。 如果没有文件，那么......欢迎来到地狱。 
 
 2）您对外部图书馆的呼叫服从其合同并且是正确的。 如果是这种情况，库本身可能存在错误。 根据库，请查阅文档或任何在线社区站点，以验证是否已知该特定错误，是否存在解决方法，或者您是否遇到问题。 
 
 找出这两件事中的哪一件，然后决定如何继续前进。 它可能正在改变您的代码，它可能正在改变您使用的库，它可能是两者的某种组合。 没有任何更多的细节，这是不可能的。 祝你好运！ 

 
 
I step through the code as the application is running on the Android device but the exception occurs in code that is not part of the application
 
 
As you've done, step through your application code line by line in a debugger, until you get to the last line which runs before the exception is thrown. 
 
On this line, you'll find a call to some external library. You've said you don't have the source for this library. That's unfortunate, but it's not the end of the road.
 
The simplest next steps come from realising that your exception is most probably caused by one of two things:
 
1) You're using the external library in a way it wasn't designed to be used. For example, feeding it some bad data, using its functionality out of sequence, or just in the wrong way. Read the documentation and try to understand if this is the problem. If there is no documentation, well.. welcome to hell.
 
2) Your call to the external library obeys its contract and is correct. If that's the case, there may be a bug in the library itself. Depending on the library, consult the documentation or any online community sites to verify if that specific bug is known, if there's a workaround, or if you're stuck.
 
Find out which of these two things it is, then make a decision on how to move on. It might be changing your code, it might be changing the library you use, it might be some combination of the two. Without any more details it's impossible to say. Good luck!