Unable to find a result type for extension [...] in location attribute

There are probably many reasons. I only say what I encountered.

The project uses spring + struts2 + JPA, Maven management, JSP in Java/main/webapp/WEB-INF/content.

Generally, Action sets a directory, but there are several JSP files under the root directory, such as login. JSP, Main. JSP, nopermisson. JSP, corresponding to the action with namespace set.

Nopermission. Action.

I have a common action file: crudaction, which implements some basic actions. Most other actions inherit from it.

In this crudaction, a result named nopermission is defined to point to nopermission. Action under the root directory. The initial statement is as follows:

@Results({@Result(name = "nopermission", location = "/nopermission.action") })public abstract class CrudAction<T, TService extends ICrudService<T>> extendsCrudActionSupport<T> {public static final String NOPERMISSION = "nopermission";……｝ 

Run Tomcat and start to report the following error:

16:48:18, 483 [main] error [Org. apache. struts2.dispatcher. dispatcher]-DISPATCHER initialization failedunable to load configuration. -[unknown location] at com. opensymphony. xwork2.config. configurationmanager. getconfiguration (configurationmanager. java: 69) at Org. apache. struts2.dispatcher. dispatcher. init_preloadconfiguration (dispatcher. java: 390) at Org. apache. struts2.dispatcher. dispatcher. init (dispatcher. java: 436) at Org. apache. struts2.dispatcher. ng. initoperations. initdispatcher (initoperations. java: 69) at Org. apache. struts2.dispatcher. ng. filter. strutsprepareandexecutefilter. init (strutsprepareandexecutefilter. java: 51) at Org. apache. catalina. core. applicationfilterconfig. getfilter (applicationfilterconfig. java: 295) at Org. apache. catalina. core. applicationfilterconfig. setfilterdef (applicationfilterconfig. java: 422) at Org. apache. catalina. core. applicationfilterconfig. <init> (applicationfilterconfig. java: 115) at Org. apache. catalina. core. standardcontext. filterstart (standardcontext. java: 4001) at Org. apache. catalina. core. standardcontext. start (standardcontext. java: 4651) at Org. apache. catalina. core. containerbase. start (containerbase. java: 1045) at Org. apache. catalina. core. standardhost. start (standardhost. java: 785) at Org. apache. catalina. core. containerbase. start (containerbase. java: 1045) at Org. apache. catalina. core. standardengine. start (standardengine. java: 445) at Org. apache. catalina. startup. embedded. start (embedded. java: 825) at Org. codehaus. mojo. tomcat. abstractrunmojo. startcontainer (maid. java: 558) at org.codehaus.mojo.tomcat.abstractrunmojo.exe cute (abstractrunmojo. java: 255) at org.apache.maven.plugin.defabuilbuildpluginmanager.exe cutemojo (defabuilbuildpluginmanager. java: 101) at org.apache.maven.lifecycle.internal.mojoexecutor.exe cute (mojoexecutor. java: 209) at org.apache.maven.lifecycle.internal.mojoexecutor.exe cute (mojoexecutor. java: 153) at org.apache.maven.lifecycle.internal.mojoexecutor.exe cute (mojoexecutor. java: 145) at Org. apache. maven. lifecycle. internal. lifecyclemodulebuilder. buildproject (lifecyclemodulebuilder. java: 84) at Org. apache. maven. lifecycle. internal. lifecyclemodulebuilder. buildproject (lifecyclemodulebuilder. java: 59) at Org. apache. maven. lifecycle. internal. lifecyclestarter. singlethreadedbuild (lifecyclestarter. java: 183) at org.apache.maven.lifecycle.internal.lifecyclestarter.exe cute (lifecyclestarter. java: 161) at Org. apache. maven. defaultmaven. doexecute (defaultmaven. java: 320) at org.apache.maven.defaultmaven.exe cute (defaultmaven. java: 156) at org.apache.maven.cli.mavencli.exe cute (mavencli. java: 537) at Org. apache. maven. CLI. mavencli. domain (mavencli. java: 196) at Org. apache. maven. CLI. mavencli. main (mavencli. java: 141) at Sun. reflect. nativemethodaccessorimpl. invoke0 (native method) at Sun. reflect. nativemethodaccessorimpl. invoke (nativemethodaccessorimpl. java: 57) at Sun. reflect. delegatingmethodaccessorimpl. invoke (delegatingmethodaccessorimpl. java: 43) at java. lang. reflect. method. invoke (method. java: 601) at Org. codehaus. plexus. classworlds. launcher. launcher. launchenhanced (launcher. java: 290) at Org. codehaus. plexus. classworlds. launcher. launcher. launch (launcher. java: 230) at Org. codehaus. plexus. classworlds. launcher. launcher. mainwithexitcode (launcher. java: 409) at Org. codehaus. plexus. classworlds. launcher. launcher. main (launcher. java: 352) caused by: unable to find a result type for extension [action] in location attribute [/nopermission. action]. -[unknown location] At Org. apache. struts2.convention. defaultresultmapbuilder $ resultinfo. determinetype (defaultresultmapbuilder. java: 513) at Org. apache. struts2.convention. defaultresultmapbuilder $ resultinfo. <init> (defaultresultmapbuilder. java: 485) at Org. apache. struts2.convention. defaultresultmapbuilder. createfromannotations (defaultresultmapbuilder. java: 410) at Org. apache. struts2.convention. defaultresultmapbuilder. createresultsfromannotations (defaultresultmapbuilder. java: 220) at Org. apache. struts2.convention. defaultresultmapbuilder. build (defaultresultmapbuilder. java: 196) at Org. apache. struts2.convention. packagebasedactionconfigbuilder. createactionconfig (packagebasedactionconfigbuilder. java: 864) at Org. apache. struts2.convention. packagebasedactionconfigbuilder. buildconfiguration (packagebasedactionconfigbuilder. java: 636) at Org. apache. struts2.convention. packagebasedactionconfigbuilder. buildactionconfigs (packagebasedactionconfigbuilder. java: 335) at Org. apache. struts2.convention. classpathpackageprovider. loadpackages (classpathpackageprovider. java: 53) at com. opensymphony. xwork2.config. impl. defaultconfiguration. reloadcontainer (defaultconfiguration. java: 215) at com. opensymphony. xwork2.config. configurationmanager. getconfiguration (configurationmanager. java: 66 )... 37 more May 11 4:48:18 Org. apache. catalina. core. standardcontext filterstart is serious: exception starting filter struts2filterunable to load configuration. -[unknown location] At Org. apache. struts2.dispatcher. dispatcher. init (dispatcher. java: 449) at Org. apache. struts2.dispatcher. ng. initoperations. initdispatcher (initoperations. java: 69) at Org. apache. struts2.dispatcher. ng. filter. strutsprepareandexecutefilter. init (strutsprepareandexecutefilter. java: 51) at Org. apache. catalina. core. applicationfilterconfig. getfilter (applicationfilterconfig. java: 295) at Org. apache. catalina. core. applicationfilterconfig. setfilterdef (applicationfilterconfig. java: 422) at Org. apache. catalina. core. applicationfilterconfig. <init> (applicationfilterconfig. java: 115) at Org. apache. catalina. core. standardcontext. filterstart (standardcontext. java: 4001) at Org. apache. catalina. core. standardcontext. start (standardcontext. java: 4651) at Org. apache. catalina. core. containerbase. start (containerbase. java: 1045) at Org. apache. catalina. core. standardhost. start (standardhost. java: 785) at Org. apache. catalina. core. containerbase. start (containerbase. java: 1045) at Org. apache. catalina. core. standardengine. start (standardengine. java: 445) at Org. apache. catalina. startup. embedded. start (embedded. java: 825) at Org. codehaus. mojo. tomcat. abstractrunmojo. startcontainer (maid. java: 558) at org.codehaus.mojo.tomcat.abstractrunmojo.exe cute (abstractrunmojo. java: 255) at org.apache.maven.plugin.defabuilbuildpluginmanager.exe cutemojo (defabuilbuildpluginmanager. java: 101) at org.apache.maven.lifecycle.internal.mojoexecutor.exe cute (mojoexecutor. java: 209) at org.apache.maven.lifecycle.internal.mojoexecutor.exe cute (mojoexecutor. java: 153) at org.apache.maven.lifecycle.internal.mojoexecutor.exe cute (mojoexecutor. java: 145) at Org. apache. maven. lifecycle. internal. lifecyclemodulebuilder. buildproject (lifecyclemodulebuilder. java: 84) at Org. apache. maven. lifecycle. internal. lifecyclemodulebuilder. buildproject (lifecyclemodulebuilder. java: 59) at Org. apache. maven. lifecycle. internal. lifecyclestarter. singlethreadedbuild (lifecyclestarter. java: 183) at org.apache.maven.lifecycle.internal.lifecyclestarter.exe cute (lifecyclestarter. java: 161) at Org. apache. maven. defaultmaven. doexecute (defaultmaven. java: 320) at org.apache.maven.defaultmaven.exe cute (defaultmaven. java: 156) at org.apache.maven.cli.mavencli.exe cute (mavencli. java: 537) at Org. apache. maven. CLI. mavencli. domain (mavencli. java: 196) at Org. apache. maven. CLI. mavencli. main (mavencli. java: 141) at Sun. reflect. nativemethodaccessorimpl. invoke0 (native method) at Sun. reflect. nativemethodaccessorimpl. invoke (nativemethodaccessorimpl. java: 57) at Sun. reflect. delegatingmethodaccessorimpl. invoke (delegatingmethodaccessorimpl. java: 43) at java. lang. reflect. method. invoke (method. java: 601) at Org. codehaus. plexus. classworlds. launcher. launcher. launchenhanced (launcher. java: 290) at Org. codehaus. plexus. classworlds. launcher. launcher. launch (launcher. java: 230) at Org. codehaus. plexus. classworlds. launcher. launcher. mainwithexitcode (launcher. java: 409) at Org. codehaus. plexus. classworlds. launcher. launcher. main (launcher. java: 352) caused by: Unable to load configuration. -[unknown location] at com. opensymphony. xwork2.config. configurationmanager. getconfiguration (configurationmanager. java: 69) at Org. apache. struts2.dispatcher. dispatcher. init_preloadconfiguration (dispatcher. java: 390) at Org. apache. struts2.dispatcher. dispatcher. init (dispatcher. java: 436 )... 35 morecaused by: unable to find a result type for extension [action] in location attribute [/nopermission. action]. -[unknown location] At Org. apache. struts2.convention. defaultresultmapbuilder $ resultinfo. determinetype (defaultresultmapbuilder. java: 513) at Org. apache. struts2.convention. defaultresultmapbuilder $ resultinfo. <init> (defaultresultmapbuilder. java: 485) at Org. apache. struts2.convention. defaultresultmapbuilder. createfromannotations (defaultresultmapbuilder. java: 410) at Org. apache. struts2.convention. defaultresultmapbuilder. createresultsfromannotations (defaultresultmapbuilder. java: 220) at Org. apache. struts2.convention. defaultresultmapbuilder. build (defaultresultmapbuilder. java: 196) at Org. apache. struts2.convention. packagebasedactionconfigbuilder. createactionconfig (packagebasedactionconfigbuilder. java: 864) at Org. apache. struts2.convention. packagebasedactionconfigbuilder. buildconfiguration (packagebasedactionconfigbuilder. java: 636) at Org. apache. struts2.convention. packagebasedactionconfigbuilder. buildactionconfigs (packagebasedactionconfigbuilder. java: 335) at Org. apache. struts2.convention. classpathpackageprovider. loadpackages (classpathpackageprovider. java: 53) at com. opensymphony. xwork2.config. impl. defaultconfiguration. reloadcontainer (defaultconfiguration. java: 215) at com. opensymphony. xwork2.config. configurationmanager. getconfiguration (configurationmanager. java: 66 )... 37 more

Then, I changed it to the following:

@Results({@Result(name = "nopermission", location = "/nopermission.action", type = "redirect") })public abstract class CrudAction<T, TService extends ICrudService<T>> extendsCrudActionSupport<T> {public static final String NOPERMISSION = "nopermission";……｝

The default result type of action is dispatcher. The location of this method can only be page, not another action.

The following two URLs provide a brief explanation of the problem:

Http://hi.baidu.com/foreverfly8/item/4bfae9cc04abb80c0bd93a79

Http://blog.sina.com.cn/s/blog_56b7aaa10100eqs4.html