Void respond (RuntimeException, RequestCycle) is called whenever an uncaught exception occurs during the event handling or response phase so that an appropriate exception response can be generated.
只要在事件处理过程或响应阶段发生未被捕获的异常，void respond (RuntimeException, RequestCycle)都会被调用以便生成合适的异常响应。
Level 2 can be used for detailed modeling including event and exception handling and is described as analytical BPMN. It USES a wide range of BPMN constructs.
层次2是包括事件和异常处理的详细建模，它描述为分析式BPMN。它使用了多种结构的BPMN。
This exception is caught within the subprocess by the error start event handling the bad credit card exception.
通过错误开始事件处理失败的信用卡异常，在子流程捕获异常。
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