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https://issues.apache.org/struts/browse/WW-2203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_42248
]
Piero Sartini commented on WW-2203:
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Same problem here - this is not only with the showcase.
I was not able to get 2.1 working with the m2 archetype starter application.
> struts2 showcase throws NPE when starting app server
> ----------------------------------------------------
>
> Key: WW-2203
> URL: https://issues.apache.org/struts/browse/WW-2203
> Project: Struts 2
> Issue Type: Bug
> Components: Examples
> Affects Versions: 2.1.x
> Environment: Using Java 1.6.0_02 on Windows XP, I pulled the struts
> source from SVN and used maven 2.0.7 to build. Once done, I imported the
> struts2-showcase war file into my eclipse WTP installation and set it to use
> my Tomcat 5.5.23.
> Reporter: Wes Wannemacher
> Priority: Minor
>
> When attempting to access the struts2-showcase app, tomcat is unable to
> deploy it and there is an NPE in the console. It is as follows -
> 2007-09-24 13:13:15,750 ERROR
> (org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/struts2-showcase]:3639)
> - Exception starting filter struts
> java.lang.NullPointerException
> at
> org.apache.struts2.config.StrutsXmlConfigurationProvider.needsReload(StrutsXmlConfigurationProvider.java:165)
> at
> com.opensymphony.xwork2.config.ConfigurationManager.conditionalReload(ConfigurationManager.java:165)
> at
> com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:59)
> at
> org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:827)
> at
> org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:202)
> at
> org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:221)
> at
> org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:302)
> at
> org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:78)
> at
> org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3635)
> at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:4222)
> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
> at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
> at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
> at
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
> at
> org.apache.catalina.core.StandardService.start(StandardService.java:448)
> at
> org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
> at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
> The offending code is -
> @Override
> public boolean needsReload() {
> ActionContext ctx = ActionContext.getContext();
> return ctx.get(reloadKey) == null && super.needsReload();
> }
> The NPE is thrown in the return statement. I would assume that ctx is null. I
> would write a patch, but I am not sure what should be returned if there is no
> action context. If it helps any, I am also building xwork2 from scratch
> (using SVN and maven). When building xwork2 on my system, the
> XmlConfigurationProviderTest unit test has a failure. This seems odd to me
> though, since this exception is thrown during tomcat and/or context startup.
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