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https://issues.apache.org/jira/browse/WW-4825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16103027#comment-16103027
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Prasann Grampurohit commented on WW-4825:
-----------------------------------------
Hi [~sdutry],
Thank you for your reply. I notice that my action class is calling getText
method from a class level variable and that is why it is throwing NPE while
creating the action class bean instance.
[~aleksandr-m] had mentioned that we cannot use getText from constructor.
This was working in Struts 2.3.3, but fails after upgrading to 2.5.12. Is there
any alternative if we want to use it at load of the class?
I have also posted it on StackOverflow now.
Thanks,
Prasann
> NPE while using getText method from ActionSupport
> -------------------------------------------------
>
> Key: WW-4825
> URL: https://issues.apache.org/jira/browse/WW-4825
> Project: Struts 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.5.12
> Reporter: Prasann Grampurohit
>
> Hi,
> I am migrating a project from Struts 2.3.3 to Struts 2.5.12 and I see
> NullPointerException when using the getText method from ActionSupport class.
> My action class extends ActionSupport class. I have package.properties file
> also packaged in the war file.
> And in my action class I just use getText method to retrieve a property from
> package.properties file.
> I see the below exception. Could you please help? Thank you.
> {code:java}
> ERROR DefaultDispatcherErrorHandler Exception occurred during processing
> request: Unable to instantiate Action, entryAction, defined for 'entry' in
> namespace '/'Error creating bean with name 'entryAction' defined in
> "/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/my/company/member/web/action/entry/spring-context.xml":
> Instantiation of bean failed; nested exception is
> org.springframework.beans.BeanInstantiationException: Could not instantiate
> bean class [my.company.member.web.action.entry.EntryAction]: Constructor
> threw exception; nested exception is java.lang.NullPointerException
> Unable to instantiate Action, entryAction, defined for 'entry' in namespace
> '/'Error creating bean with name 'entryAction' defined in
> "/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/my/company/member/web/action/entry/spring-context.xml":
> Instantiation of bean failed; nested exception is
> org.springframework.beans.BeanInstantiationException: Could not instantiate
> bean class [my.company.member.web.action.entry.EntryAction]: Constructor
> threw exception; nested exception is java.lang.NullPointerException - action
> -
> vfs:/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/struts-default.xml:133:44
> at
> com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:318)
> at
> com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:399)
> at
> com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:204)
> at
> org.apache.struts2.factory.StrutsActionProxy.prepare(StrutsActionProxy.java:62)
> at
> org.apache.struts2.factory.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
> at
> com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
> at
> org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:567)
> at
> org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
> at
> org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
> at
> io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
> at
> io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
> at
> io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
> at
> io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
> at
> io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
> at
> org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
> at
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
> at
> io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
> at
> io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
> at
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
> at
> io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
> at
> io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
> at
> io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
> at
> io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
> at
> io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
> at
> io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
> at
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
> at
> org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
> at
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
> at
> io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
> at
> io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:285)
> at
> io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:264)
> at
> io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
> at
> io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:175)
> at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
> at
> io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:792)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'entryAction' defined in
> "/D:/Software/JBossEAP/jboss-eap-7.0/bin/content/Member.war/WEB-INF/classes/my/company/member/web/action/entry/spring-context.xml":
> Instantiation of bean failed; nested exception is
> org.springframework.beans.BeanInstantiationException: Could not instantiate
> bean class [my.company.member.web.action.entry.EntryAction]: Constructor
> threw exception; nested exception is java.lang.NullPointerException
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:965)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:911)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
> at
> org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
> at
> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
> at
> org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1075)
> at
> com.opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:159)
> at
> com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:172)
> at
> com.opensymphony.xwork2.factory.DefaultActionFactory.buildAction(DefaultActionFactory.java:22)
> at
> com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:137)
> at
> com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:299)
> ... 37 more
> Caused by: org.springframework.beans.BeanInstantiationException: Could not
> instantiate bean class [my.company.member.web.action.entry.EntryAction]:
> Constructor threw exception; nested exception is
> java.lang.NullPointerException
> at
> org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:141)
> at
> org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:74)
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:958)
> ... 48 more
> Caused by: java.lang.NullPointerException
> at
> com.opensymphony.xwork2.ActionSupport.getTextProvider(ActionSupport.java:278)
> at com.opensymphony.xwork2.ActionSupport.getText(ActionSupport.java:83)
> at my.company.member.web.action.MyAction.<init>(MyAction.java:95)
> at
> my.company.member.web.action.entry.EntryAction.<init>(EntryAction.java:22)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at
> org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126)
> ... 50 more
> {code}
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