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https://issues.apache.org/jira/browse/WW-3823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13281183#comment-13281183
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Lukasz Lenart commented on WW-3823:
-----------------------------------
Yeah... we upgraded Struts2 to use commons-lang3 but some external dependencies
base on commons-lang (2.x), but you're right, docs should be updated.
> Missing file in Struts 2 beginners tutorial
> -------------------------------------------
>
> Key: WW-3823
> URL: https://issues.apache.org/jira/browse/WW-3823
> Project: Struts 2
> Issue Type: Bug
> Components: Example Applications, Other
> Reporter: Cole Mercer
> Priority: Trivial
> Fix For: 2.3.5
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> The struts2 tutorial at the URL given below lists 9 files that should be
> added to WEB-INF/lib. commons-lang3-X.X.jar should be added to that list. The
> downloadable archive given as an example is slightly out of date, but does
> contain commons-lang-2.5.jar. Without some version of a "commons-lang"
> library, Apache will fail to start the user's struts2 filter in the following
> way:
> SEVERE: Exception starting filter struts2
> java.lang.NoClassDefFoundError: org/apache/commons/lang3/StringUtils
> the affected URL is:
> https://struts.apache.org/2.2.1/docs/create-struts-2-web-application-with-artifacts-in-web-inf-lib-and-use-ant-to-build-the-application.html
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