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From albert kao <albertk...@gmail.com>
Subject NullPointerException - com.opensymphony.xwork2.util.FileManager$FileRevision.needsReloading(FileManager.java:209) of "Apache Struts 2 Web Application Development" book
Date Sat, 11 Nov 2017 22:58:17 GMT
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)

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