This option produces a system dump when a NullPointerException is caught by the catch() method
当 catch() 方法捕捉到一个 NullPointerException 异常时，这个选项会产生一个系统转储文件
The error displayed is a NullPointerException occurring in the toString method on the Appointment class.
显示的错误是一个NullPointerException，它发生在appointment类上的toString方法中。
These wsdl-return-value-mapping elements should be removed (otherwise NullPointerException is thrown during the deployment).
这些wsdl - return - value - mapping元素应该删除(否则在部署期间会抛出NullPointerException)。
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