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https://issues.apache.org/jira/browse/WW-3486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12919949#action_12919949
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David Altenhof commented on WW-3486:
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I'm also getting this. Partial stack trace:
SEVERE: Exception starting filter struts2
java.lang.NoSuchMethodError:
com.opensymphony.xwork2.util.finder.ClassFinder.<init>(Lcom/opensymphony/xwork2/util/finder/ClassLoaderInterface;Ljava/util/Collection;ZLjava/util/Set;Lcom/opensymphony/xwork2/util/finder/Test;)V
at
org.apache.struts2.convention.PackageBasedActionConfigBuilder.findActions(PackageBasedActionConfigBuilder.java:377)
at
org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:335)
at
org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53)
at
com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:204)
at
com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
at
org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:371)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:415)
[snip]
> NullPointerException on struts initialization
> ----------------------------------------------
>
> Key: WW-3486
> URL: https://issues.apache.org/jira/browse/WW-3486
> Project: Struts 2
> Issue Type: Bug
> Components: Plugin - Convention
> Affects Versions: 2.1.8.1, 2.2.1
> Environment: Tomcat 5.5.26 jdk 1.6.0_01-b06 struts 2.2.1
> Reporter: Hugo Robayo
> Priority: Blocker
>
> When migrate from 2.1.8.1 to 2.2.1 the same project fails in initialization,
> in the convention plugin PackageBasedconfigBuilder method buildconfiguration
> line 592 it seems the method getPackge() return null. I solve the problem
> replace convention-plugin 2.2.1 for 2.1.8.1.
> I dont make extensive test but works fine replacing the library.
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