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https://issues.apache.org/jira/browse/LOG4J2-765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14084730#comment-14084730
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Matt Sicker commented on LOG4J2-765:
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An API+Core JAR would be neat since the API doesn't have any plugins (no shaded
Log42jPlugins.dat file). In fact, I'd like an API+Core jar just for OSGi
simplification at some point, but it's not necessary (or encouraged).
> Feature request: log warning to console if default configuration is used
> ------------------------------------------------------------------------
>
> Key: LOG4J2-765
> URL: https://issues.apache.org/jira/browse/LOG4J2-765
> Project: Log4j 2
> Issue Type: Improvement
> Components: API, Configurators, Core
> Affects Versions: 2.0, 2.0.1
> Reporter: Remko Popma
>
> To summarize a recent twitter conversation:
> a user became very frustrated that Log4j2 did not log to the configured file,
> and gave up and moved on to JUL instead.
> After some questions it turned out that (probably) the problem was that they
> had log4j-api but not log4j-core in the classpath.
> We can dismiss this saying that users should read the documentation better,
> but users are in a hurry to get things done and I can easily see this
> happening to more people.
> In the above conversation, the user pointed out that very likely, if someone
> ends up with the default configuration (log ERROR level messages to the
> console), they made a mistake.
> The feature request is that log4j should help users by printing a message to
> the console that explains why the user ended up with the default
> configuration.
> * In case log4j-core not in the classpath: {{Log4j2 could not find a logging
> implementation. Please add log4j-core to the classpath. Using SimpleLogger to
> log to the console...}}
> * In case no config file was found: {{No log4j2 configuration file found.
> Using default configuration: errors to the console.}}
> This last case is actually a frequent cause of questions on StackOverflow.
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