The Struts 2 conversion error interceptor is a subclass of the XWork 2 conversion error interceptor.

From the Javadocs of the XWork 2 interceptor:

Error formatting macro: snippet: java.lang.NullPointerException

From the Javadocs of the Struts 2 interceptor:

Error formatting macro: snippet: java.lang.NullPointerException

Parameters

Error formatting macro: snippet: java.lang.NullPointerException

Extending the Interceptor

Error formatting macro: snippet: java.lang.NullPointerException

Examples

Error formatting macro: snippet: java.lang.NullPointerException