Erro 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 com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.HttpApplication.getFilterConfig(HttpApplication.java:7592)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:515)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:370)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:871)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:453)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:221)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.HttpRequestHandler.run(HttpRequestHandler.java:122)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].server.http.HttpRequestHandler.run(HttpRequestHandler.java:111)

at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)

at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:234)

at oracle.oc4j.network.ServerSocketAcceptHandler.access$700(ServerSocketAcceptHandler.java:29)

at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:879)

at com.evermind[Oracle Containers for J2EE 10g (10.1.3.4.0) ].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:298)

at java.lang.Thread.run(Unknown Source)