If you have just started writing struts 2 application, and you are in process of configuring it then you might face this exception. Complete stack trace will look like this:
SEVERE: Dispatcher initialization failed Unable to load configuration. - [unknown location] at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:70) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:446) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:490) at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57) at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4650) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5306) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: Unable to find a result type for extension [properties] in location attribute [/struts.properties]. - [unknown location] at org.apache.struts2.convention.DefaultResultMapBuilder$ResultInfo.determineType(DefaultResultMapBuilder.java:513) at org.apache.struts2.convention.DefaultResultMapBuilder$ResultInfo.<init>(DefaultResultMapBuilder.java:476) at org.apache.struts2.convention.DefaultResultMapBuilder.makeResults(DefaultResultMapBuilder.java:397) at org.apache.struts2.convention.DefaultResultMapBuilder.createFromResources(DefaultResultMapBuilder.java:304) at org.apache.struts2.convention.DefaultResultMapBuilder.build(DefaultResultMapBuilder.java:191) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.createActionConfig(PackageBasedActionConfigBuilder.java:935) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildConfiguration(PackageBasedActionConfigBuilder.java:718) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:348) at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:260) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67) ... 18 more Aug 14, 2013 12:24:55 AM org.apache.catalina.core.StandardContext filterStart SEVERE: Exception starting filter struts2 Unable to load configuration. - [unknown location] at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:502) at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57) at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4650) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5306) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: Unable to load configuration. - [unknown location] at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:70) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:446) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:490) ... 16 more Caused by: Unable to find a result type for extension [properties] in location attribute [/struts.properties]. - [unknown location] at org.apache.struts2.convention.DefaultResultMapBuilder$ResultInfo.determineType(DefaultResultMapBuilder.java:513) at org.apache.struts2.convention.DefaultResultMapBuilder$ResultInfo.<init>(DefaultResultMapBuilder.java:476) at org.apache.struts2.convention.DefaultResultMapBuilder.makeResults(DefaultResultMapBuilder.java:397) at org.apache.struts2.convention.DefaultResultMapBuilder.createFromResources(DefaultResultMapBuilder.java:304) at org.apache.struts2.convention.DefaultResultMapBuilder.build(DefaultResultMapBuilder.java:191) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.createActionConfig(PackageBasedActionConfigBuilder.java:935) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildConfiguration(PackageBasedActionConfigBuilder.java:718) at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:348) at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:260) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67) ... 18 more
Solution
This exception is because of wrong path configured for property : “struts.convention.result.path” which normally looks like this:
<constant name="struts.convention.result.path" value="/" /> //or in properties file struts.convention.result.path=/
Well your path is incorrect. Correct it to any valid location where your JSP files are located. e.g.
<constant name="struts.convention.result.path" value="/WEB-INF/jsp/" /> //or in properties file struts.convention.result.path=/WEB-INF/jsp/
It will solve this issue.
Happy Learning !!