When you put the example SCA application into a debugger and place a breakpoint on the AddService add method, you see a call stack trace similar to Listing 4.
当使用调试器调试示例SCA应用程序并在AddServiceadd方法上设置断点时，将看到如清单 4 所示的调用堆栈跟踪。
The stack trace is a list of the method call hierarchy that starts with the method that throws the exception and ends with the method that catches the exception.
堆栈跟踪是方法调用层次结构的列表，以引发该异常的方法开始，以捕捉该异常的方法结束。
The stack trace is a list of the method call hierarchy that starts with the method that throws the exception and ends with the method that catches the exception.
堆栈跟踪是方法调用层次结构的列表，以引发该异常的方法开始，以捕捉该异常的方法结束。
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