Exception starting filter struts2 java. Lang. nullpointerexception

Source: Internet
Author: User

A small struts2 program debugging fails after devmodel is changed to true,

<constant name="struts.devMode" value="true" /> <package name="default" namespace="/" extends="struts-default">         <action name="hell">            <result>                /Hello.jsp            </result>        </action>    </package>

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. Ng. initoperations. initstaticcontentloader (initoperations. Java: 77)
At org. Apache. struts2.dispatcher. Ng. Filter. strutsprepareandexecutefilter. INIT (strutsprepareandexecutefilter. Java: 49)
At org. Apache. Catalina. Core. applicationfilterconfig. getfilter (applicationfilterconfig. Java: 295)
At org. Apache. Catalina. Core. applicationfilterconfig. setfilterdef (applicationfilterconfig. Java: 422)
At org. Apache. Catalina. Core. applicationfilterconfig. <init> (applicationfilterconfig. Java: 115)
At org. Apache. Catalina. Core. standardcontext. filterstart (standardcontext. Java: 3838)
At org. Apache. Catalina. Core. standardcontext. Start (standardcontext. Java: 4488)
At org. Apache. Catalina. Core. containerbase. addchildinternal (containerbase. Java: 791)
At org. Apache. Catalina. Core. containerbase. addchild (containerbase. Java: 771)
At org. Apache. Catalina. Core. standardhost. addchild (standardhost. Java: 546)
At org. Apache. Catalina. startup. hostconfig. deploydirectory (hostconfig. Java: 1041)
At org. Apache. Catalina. startup. hostconfig. deploydirectories (hostconfig. Java: 964)
At org. Apache. Catalina. startup. hostconfig. deployapps (hostconfig. Java: 502)
At org. Apache. Catalina. startup. hostconfig. Start (hostconfig. Java: 1277)
At org. Apache. Catalina. startup. hostconfig. lifecycleevent (hostconfig. Java: 321)
At org. Apache. Catalina. util. lifecyclesupport. firelifecycleevent (lifecyclesupport. Java: 119)
At org. Apache. Catalina. Core. containerbase. Start (containerbase. Java: 1053)
At org. Apache. Catalina. Core. standardhost. Start (standardhost. Java: 785)
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: 519)
At org. Apache. Catalina. Core. standardserver. Start (standardserver. Java: 710)
At org. Apache. Catalina. startup. Catalina. Start (Catalina. Java: 581)
At sun. Reflect. nativemethodaccessorimpl. invoke0 (native method)
At sun. Reflect. nativemethodaccessorimpl. Invoke (nativemethodaccessorimpl. Java: 39)
At sun. Reflect. delegatingmethodaccessorimpl. Invoke (delegatingmethodaccessorimpl. Java: 25)
At java. Lang. Reflect. method. Invoke (method. Java: 597)
At org. Apache. Catalina. startup. Bootstrap. Start (Bootstrap. Java: 289)
At org. Apache. Catalina. startup. Bootstrap. Main (Bootstrap. Java: 414)
21:40:14 org. Apache. Catalina. Core. standardcontext start

When devmodel is set to false, the program is normal. This change may be difficult for future program development .. I checked it online. It is a bug in struts2. The simple method is to avoid spaces in the tomcat installation directory. After testing, the method is correct and the problem is solved. (My own use: struts-2.3.8-alland tomcat-6.0.26.exe)

Related Article

E-Commerce Solutions

Leverage the same tools powering the Alibaba Ecosystem

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.