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From Dave Newton <davelnew...@gmail.com>
Subject Re: NullPointerException - com.opensymphony.xwork2.util.FileManager$FileRevision.needsReloading(FileManager.java:209) of "Apache Struts 2 Web Application Development" book
Date Sun, 12 Nov 2017 02:47:31 GMT
What version of Struts 2 are you attempting to use?

On Sat, Nov 11, 2017 at 5:58 PM albert kao <albertkao3@gmail.com> wrote:

> I downloaded the source code of the book "Apache Struts 2 Web Application
> Development" by Dave Newton from the
> https://www.packtpub.com/books/content/support.
>
> Chapter 2 had compile error with Apache Maven 3.5.0.
> $ mvn -version
> Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426;
> 2017-04-03T15:39:06-04:00)
> Maven home: /home/alkao/maven/apache-maven-3.5.0
> Java version: 1.8.0_144, vendor: Oracle Corporation
> Java home: /home/alkao/jdk/jdk1.8.0_144/jre
> Default locale: en_CA, platform encoding: UTF-8
> OS name: "linux", version: "4.4.0-21-generic", arch: "i386", family: "unix"
>
> To fix it, I removed just the <scope> tag in pom.xml.
> Then run mvn:
> $ cd
> /home/alkao/Struts2/Apache_Struts_2_Web_Application_Development/ch02/sanity
> $ mvn clean package
>
> Running wildfly-10.1.0.Final:
> $ JBOSS_HOME/bin/standalone.sh
> $ jboss-cli.sh --connect --command="deploy
>
> /home/alkao/Struts2/Apache_Struts_2_Web_Application_Development/ch02/sanity/target/ch02-sanity-1.0.war
> --force"
>
> Running these 3 http links resulted in the same error in the web browser
> below.
> Please help. Thanks.
> http://localhost:8080/ch02-sanity-1.0/index.html
> http://localhost:8080/ch02-sanity-1.0/sanity.jsp
> http://localhost:8080/ch02-sanity-1.0/sanity.action
>
>
>
>
> Error processing request
> Context Path:
> /ch02-convention-1.0
>
> Servlet Path:
> /index.html
>
> Path Info:
> null
>
> Query String:
> null
>
> Stack Trace
> java.lang.NullPointerException
>
> com.opensymphony.xwork2.util.FileManager$FileRevision.needsReloading(FileManager.java:209)
>
> com.opensymphony.xwork2.util.FileManager.fileNeedsReloading(FileManager.java:60)
>
> com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.needsReload(XmlConfigurationProvider.java:325)
>
> org.apache.struts2.config.StrutsXmlConfigurationProvider.needsReload(StrutsXmlConfigurationProvider.java:168)
>
> com.opensymphony.xwork2.config.ConfigurationManager.conditionalReload(ConfigurationManager.java:220)
>
> com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:61)
> org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:774)
>
> org.apache.struts2.dispatcher.ng.InitOperations.initStaticContentLoader(InitOperations.java:77)
>
> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:49)
>
> io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:111)
>
> org.wildfly.extension.undertow.security.RunAsLifecycleInterceptor.init(RunAsLifecycleInterceptor.java:84)
>
> io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:97)
> io.undertow.servlet.core.ManagedFilter.createFilter(ManagedFilter.java:80)
> io.undertow.servlet.core.ManagedFilter.getFilter(ManagedFilter.java:66)
> io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
>
> io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
>
> io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
>
> io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
>
> io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
>
> org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
>
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>
> io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
>
> io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
>
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>
> io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
>
> io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
>
> io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
>
> io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
>
> io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
>
> io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
>
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>
> org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
>
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
>
> io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
>
> io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
>
> io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
>
> io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
>
> io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
>
> io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
>
> io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
>
> io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
>
> io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
>
> io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
>
> io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
>
> io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
>
> io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
>
> io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
> io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
> io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> java.lang.Thread.run(Thread.java:748)
>
-- 
e: davelnewton@gmail.com
m: 908-380-8699
s: davelnewton_skype
t: @dave_newton <https://twitter.com/dave_newton>
b: Bucky Bits <http://buckybits.blogspot.com/>
g: davelnewton <https://github.com/davelnewton>
so: Dave Newton <http://stackoverflow.com/users/438992/dave-newton>

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