我有一个简单的Grails 2.3.7应用程序，在UrlMappings.groovy中配置了错误处理：
class UrlMappings {
static mappings = {
"403"(controller: "error", action: "handleForbidden")
"404"(controller: "error", action: "handleNotFound")
"500"(controller: "error", action: "handleError")
}
}
当我通过常规请求访问禁止的URL时，这可以正常工作，但是当我将多部分请求（例如上传文件）发布到禁止的URL时，服务器总是返回500错误，其中包含以下stacktrace：
ERROR errors.GrailsExceptionResolver - IllegalArgumentException occurred when processing request: [POST] /igetit/
Method name must not be null. Stacktrace follows:
Message: Method name must not be null
Line | Method
->> 112 | notNull in org.springframework.util.Assert
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 156 | findMethod in org.springframework.util.ReflectionUtils
| 41 | retrieveAction . . . . . . . . . . . in grails.plugin.cache.web.ProxyAwareMixedGrailsControllerHelper
| 226 | executeAction in org.codehaus.groovy.grails.web.servlet.mvc.AbstractGrailsControllerHelper
| 197 | handleURI . . . . . . . . . . . . . . in ''
| 121 | handleURI in ''
| 72 | handleRequest . . . . . . . . . . . . in org.codehaus.groovy.grails.web.servlet.mvc.SimpleGrailsController
| 48 | handle in org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter
| 355 | doDispatch . . . . . . . . . . . . . in org.codehaus.groovy.grails.web.servlet.GrailsDispatcherServlet
| 856 | doService in org.springframework.web.servlet.DispatcherServlet
| 953 | processRequest . . . . . . . . . . . in org.springframework.web.servlet.FrameworkServlet
| 855 | doPost in ''
| 646 | service . . . . . . . . . . . . . . . in javax.servlet.http.HttpServlet
| 829 | service in org.springframework.web.servlet.FrameworkServlet
| 727 | service . . . . . . . . . . . . . . . in javax.servlet.http.HttpServlet
| 303 | internalDoFilter in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter . . . . . . . . . . . . . . in ''
| 134 | doFilter in org.codehaus.groovy.grails.web.sitemesh.GrailsPageFilter
| 241 | internalDoFilter . . . . . . . . . . in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter in ''
| 330 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 108 | invoke in org.springframework.security.web.access.intercept.FilterSecurityInterceptor
| 84 | doFilter . . . . . . . . . . . . . . in ''
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 113 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.access.ExceptionTranslationFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| -1 | call . . . . . . . . . . . . . . . . in javax.servlet.FilterChain$doFilter
| 88 | processFilterChain in com.odobo.grails.plugin.springsecurity.rest.RestTokenValidationFilter
| -1 | this$3$processFilterChain . . . . . . in ''
| 56 | doFilter in ''
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 53 | doFilter in grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 146 | doFilter in org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 150 | doFilter in org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| -1 | call in javax.servlet.FilterChain$doFilter
| 108 | doFilter . . . . . . . . . . . . . . in com.odobo.grails.plugin.springsecurity.rest.RestAuthenticationFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 199 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter
| 49 | doFilter in grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 82 | doFilter in grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| -1 | call in javax.servlet.FilterChain$doFilter
| 66 | doFilter . . . . . . . . . . . . . . in com.odobo.grails.plugin.springsecurity.rest.RestLogoutFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 65 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.context.SecurityContextPersistenceFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 192 | doFilterInternal . . . . . . . . . . in org.springframework.security.web.FilterChainProxy
| 166 | doFilter in ''
| 343 | invokeDelegate . . . . . . . . . . . in org.springframework.web.filter.DelegatingFilterProxy
| 260 | doFilter in ''
| 241 | internalDoFilter . . . . . . . . . . in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter in ''
| 101 | doFilter . . . . . . . . . . . . . . in org.springframework.web.filter.OncePerRequestFilter
| 241 | internalDoFilter in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter . . . . . . . . . . . . . . in ''
| 748 | invoke in org.apache.catalina.core.ApplicationDispatcher
| 488 | processRequest . . . . . . . . . . . in ''
| 411 | doForward in ''
| 338 | forward . . . . . . . . . . . . . . . in ''
| 332 | forwardRequestForUrlMappingInfo in org.codehaus.groovy.grails.web.util.WebUtils
| 297 | forwardRequestForUrlMappingInfo . . . in ''
| 152 | doDispatch in org.codehaus.groovy.grails.web.servlet.ErrorHandlingServlet
| 856 | doService . . . . . . . . . . . . . . in org.springframework.web.servlet.DispatcherServlet
| 953 | processRequest in org.springframework.web.servlet.FrameworkServlet
| 855 | doPost . . . . . . . . . . . . . . . in ''
| 646 | service in javax.servlet.http.HttpServlet
| 829 | service . . . . . . . . . . . . . . . in org.springframework.web.servlet.FrameworkServlet
| 727 | service in javax.servlet.http.HttpServlet
| 303 | internalDoFilter . . . . . . . . . . in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter in ''
| 233 | executeFilterChainWithWrappedResponse in org.codehaus.groovy.grails.web.sitemesh.GrailsPageFilter
| 208 | obtainContent in ''
| 153 | doFilter . . . . . . . . . . . . . . in ''
| 241 | internalDoFilter in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter . . . . . . . . . . . . . . in ''
| 330 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 108 | invoke . . . . . . . . . . . . . . . in org.springframework.security.web.access.intercept.FilterSecurityInterceptor
| 84 | doFilter in ''
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 113 | doFilter in org.springframework.security.web.access.ExceptionTranslationFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| -1 | call in javax.servlet.FilterChain$doFilter
| 88 | processFilterChain . . . . . . . . . in com.odobo.grails.plugin.springsecurity.rest.RestTokenValidationFilter
| -1 | this$3$processFilterChain in ''
| 56 | doFilter . . . . . . . . . . . . . . in ''
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 53 | doFilter . . . . . . . . . . . . . . in grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 139 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 150 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| -1 | call . . . . . . . . . . . . . . . . in javax.servlet.FilterChain$doFilter
| 108 | doFilter in com.odobo.grails.plugin.springsecurity.rest.RestAuthenticationFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 199 | doFilter in org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter
| 49 | doFilter . . . . . . . . . . . . . . in grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 82 | doFilter . . . . . . . . . . . . . . in grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter
| 342 | doFilter in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| -1 | call . . . . . . . . . . . . . . . . in javax.servlet.FilterChain$doFilter
| 66 | doFilter in com.odobo.grails.plugin.springsecurity.rest.RestLogoutFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 87 | doFilter in org.springframework.security.web.context.SecurityContextPersistenceFilter
| 342 | doFilter . . . . . . . . . . . . . . in org.springframework.security.web.FilterChainProxy$VirtualFilterChain
| 192 | doFilterInternal in org.springframework.security.web.FilterChainProxy
| 160 | doFilter . . . . . . . . . . . . . . in ''
| 343 | invokeDelegate in org.springframework.web.filter.DelegatingFilterProxy
| 260 | doFilter . . . . . . . . . . . . . . in ''
| 241 | internalDoFilter in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter . . . . . . . . . . . . . . in ''
| 69 | doFilterInternal in org.codehaus.groovy.grails.web.servlet.mvc.GrailsWebRequestFilter
| 107 | doFilter . . . . . . . . . . . . . . in org.springframework.web.filter.OncePerRequestFilter
| 241 | internalDoFilter in org.apache.catalina.core.ApplicationFilterChain
| 208 | doFilter . . . . . . . . . . . . . . in ''
| 748 | invoke in org.apache.catalina.core.ApplicationDispatcher
| 488 | processRequest . . . . . . . . . . . in ''
| 411 | doForward in ''
| 338 | forward . . . . . . . . . . . . . . . in ''
| 466 | custom in org.apache.catalina.core.StandardHostValve
| 337 | status . . . . . . . . . . . . . . . in ''
| 202 | invoke in ''
| 98 | invoke . . . . . . . . . . . . . . . in org.apache.catalina.valves.ErrorReportValve
| 116 | invoke in org.apache.catalina.core.StandardEngineValve
| 408 | service . . . . . . . . . . . . . . . in org.apache.catalina.connector.CoyoteAdapter
| 1040 | process in org.apache.coyote.http11.AbstractHttp11Processor
| 607 | process . . . . . . . . . . . . . . . in org.apache.coyote.AbstractProtocol$AbstractConnectionHandler
| 313 | run in org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor
| 1145 | runWorker . . . . . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor
| 615 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 724 | run . . . . . . . . . . . . . . . . . in java.lang.Thread
我可以使用这种声明性语法处理多部分请求的403错误，还是有另一种方法来处理它们？