[ https://issues.apache.org/jira/browse/WW-4974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16668829#comment-16668829 ] 

Lukasz Lenart commented on WW-4974:
-----------------------------------

The easiest workaround is to set {{struts.configuration.xml.reload}} to {{false}}

> NullPointerException in DefaultStaticContentLoader#findStaticResource
> ---------------------------------------------------------------------
>
>                 Key: WW-4974
>                 URL: https://issues.apache.org/jira/browse/WW-4974
>             Project: Struts 2
>          Issue Type: Bug
>    Affects Versions: 2.5.18
>         Environment: Tomcat 9 on Ubuntu 18 Java 8 struts 2.5.18
>            Reporter: nikos dimitrakas
>            Priority: Major
>             Fix For: 2.6, 2.5.19
>
>
> pathPrefixes is null. The defaults that were loaded correctly in previous versions are now not loaded. The method setHostConfig does not get called like in previous versions.
> This causes all js files to not be found. For example 
> /struts/js/base/version.min.js
> /struts/js/base/jquery-2.2.4.min.js
> /struts/js/struts2/jquery.ui.struts2.min.js
> /struts/js/struts2/jquery.datatables.struts2.min.js
> /struts/js/plugins/jquery.dataTables.min.js



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