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https://issues.apache.org/jira/browse/LOG4J2-873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Remko Popma resolved LOG4J2-873.
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Resolution: Fixed
Fixed in master in commits d17a1d3f and bbcb663a.
If no <display-name> is configured, log4j will now use the servlet context path
of the web application as the logger context name.
Please verify and close.
> Omitting display-name element in web.xml causes incorrect log4j initialization
> ------------------------------------------------------------------------------
>
> Key: LOG4J2-873
> URL: https://issues.apache.org/jira/browse/LOG4J2-873
> Project: Log4j 2
> Issue Type: Bug
> Components: Web/Servlet
> Affects Versions: 2.0.2
> Reporter: Martin Dickins
> Assignee: Remko Popma
> Fix For: 2.5
>
>
> The initializeNonJndi method in Log4jWebInitializerImpl uses
> servletContext.getServletContextName() to get a context name (if the name
> hasn't been defined using log4jContextName). getServletContextName() returns
> the name as specified in the <display-name> element in web.xml, but that is
> optional.
> If neither <display-name> nor log4jContextName is defined, this results in
> the servletContext not being set, so the WebLookup doesn't work. The
> following error is displayed on the console:
> {quote}
> No Log4j context configuration provided. This is very unusual.
> {quote}
> It should use some sort of default. Probably the name of the war file or
> context file, if there's a generic way of getting that.
> ----
> Follow-up: as noted below, it is more than just WebLookup that fails if this
> happens. Log4j is initialized incorrectly: logging will work, but when the
> web application is stopped the logging context is not stopped, causing Tomcat
> to complain about Threads not being stopped and ThreadLocals not being
> cleaned up.
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