Error Handling

Here we describe how to handle errors. An error is caused by an exception that is not caught by the application. An exception might be thrown in two situations: when loading a ZUML document, and when serving an AU request (aka, an Ajax request).

Error Handling When Loading ZUML Documents

If an un-caught exception is thrown when loading a ZUML document, it is handled directly by the Web server. In other words, the handling is no different from other servlets.

By default, the Web server displays an error page showing the error message and stack trace. For example,

You can customize the error handling by specifying the error page in WEB-INF/web.xml as follows. Refer to Java Servlet Specification for more details.

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