It is a known problem in xwork:

https://issues.apache.org/struts/browse/WW-2956

setting devMode to false would prevent it.
musachy

On Mon, Feb 9, 2009 at 3:41 PM, ryangr <[email protected]> wrote:
>
> I'm trying to migrate from 2.0.14 to 2.1.6 and am getting the following error
> in my console preventing my app from starting:
>
> Feb 9, 2009 2:23:02 PM org.apache.catalina.core.StandardContext filterStart
> SEVERE: Exception starting filter struts2
> java.lang.NullPointerException
>        at
> com.opensymphony.xwork2.util.FileManager$FileRevision.needsReloading(FileManager.java:209)
>        at
> com.opensymphony.xwork2.util.FileManager.fileNeedsReloading(FileManager.java:60)
>        at
> com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.needsReload(XmlConfigurationProvider.java:325)
>        at
> org.apache.struts2.config.StrutsXmlConfigurationProvider.needsReload(StrutsXmlConfigurationProvider.java:168)
>        at
> com.opensymphony.xwork2.config.ConfigurationManager.conditionalReload(ConfigurationManager.java:220)
>        at
> com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:61)
>        at
> org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:774)
>        at
> org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:191)
>        at
> org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
>        at
> org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
>        at
> org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
>        at
> org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3709)
>        at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:4363)
>        at 
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
>        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
>        at 
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
>        at 
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
>        at 
> org.apache.catalina.core.StandardService.start(StandardService.java:516)
>        at 
> org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
>        at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>        at java.lang.reflect.Method.invoke(Unknown Source)
>        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
>        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
> Feb 9, 2009 2:23:02 PM org.apache.catalina.core.StandardContext start
> SEVERE: Error filterStart
> Feb 9, 2009 2:23:02 PM org.apache.catalina.core.StandardContext start
> SEVERE: Context [/WebDocs] startup failed due to previous errors
>
>
> My web.xml contains these lines referring to the filter struts2:
> <filter>
>    <filter-name>struts2</filter-name>
>
> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
>  </filter>
>  <filter-mapping>
>    <filter-name>struts2</filter-name>
>    <url-pattern>/*</url-pattern>
>  </filter-mapping>
>
> Has something changed in the filter configuration that would prevent
> startup?
> --
> View this message in context: 
> http://www.nabble.com/2.0.14--%3E-2.1.6-filter-config-issue-tp21921487p21921487.html
> Sent from the Struts - User mailing list archive at Nabble.com.
>
>
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>



-- 
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