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From "Matt Sicker (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-1841) Problems with consequences after LOG4J2-248
Date Mon, 13 Mar 2017 14:04:41 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-1841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15907505#comment-15907505
] 

Matt Sicker commented on LOG4J2-1841:
-------------------------------------

So then is the servlet class loader not the correct loader here? That's what would be used
to find a classpath resource in your WEB-INF directory I thought (sorry, haven't had to program
in servlets in a while).

> Problems with consequences after LOG4J2-248
> -------------------------------------------
>
>                 Key: LOG4J2-1841
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1841
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Boot
>    Affects Versions: 2.8
>         Environment: Linux, Tomcat, WebApps
>            Reporter: Seweryn Habdank-Wojewodzki
>
> Situation till Log4j v. 2.5 (including it):
> 1. One instance of embedded Jetty (programatically started) WITHOUT definition of the
log4j.configurationFile variable.
> 2. WAR deployed on within this concrete instance of the embedded Jetty.
> 3. WAR internally contains own log4j2.xml file. So every Log4j instance, which is global
for the WebApp, but local for the Jetty, will search and use configuration in own class path.
> Works in the way that every Web-App got own Log4j configuration and will operate according
to own definitions (appenders, layouts, loggers).
> In the Log4j v. 2.6 and later in the same setup we are observing the following:
> Log4j in the applications are reporting problem that config file (log4j2.xml) is not
visible. Thus we got message, that Log4j will switch to backup mode which will write only
ERRORs in the console.
> We debuged that issue and found that change made in:
> https://issues.apache.org/jira/browse/LOG4J2-248
> seems to be the main reason.
> We cannot asses if this change was made only with respect to some PMD warning or it has
as well some design considerations in background.
> The consequence is that Web Server instance shall define log4j.configurationFile variable,
but also it means ALL WebApps within Application Container will use one single configuration,
what makes definitely problem, as all WebApps providers must agree on ONE configuration including
appenders configuration, message Layout and so on.
> Consider this report and provide solution (or workaround) or maybe just reasonable comment
for the given system setup, please :-).



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