How to handle custom inteceptors execptions in Struts 2?
org.apache.commons.fileupload.FileUploadBase$SizeLimitExceededException: the request was rejected because its size (337867) exceeds the configured maximum (200)
<global-exception-mappings>
<exception-mapping exception="java.lang.NullPointerException" result="npe"/>
</global-exception-mappings>