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https://issues.apache.org/jira/browse/LOG4J2-631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13991263#comment-13991263
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Matt Sicker commented on LOG4J2-631:
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Looking at AbstractLoggerProvider in log4j-api, the MessageFactory is a private
final field. This is done at construction, and since Loggers are keyed by name,
you can't use multiple loggers with the same name and different MessageFactory
instances. If you were to allow having two named loggers with different message
factories, what would LogManager.getLogger("name") do? You have two potential
Logger objects to get. I don't think this makes any sense. Probably invalid.
> Cannot use formatter logger and standard logger with same name
> --------------------------------------------------------------
>
> Key: LOG4J2-631
> URL: https://issues.apache.org/jira/browse/LOG4J2-631
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.0-rc1
> Reporter: Alexandre Gattiker
>
> {code}
> public class Example {
> private final static Logger FORMATTER_LOGGER =
> LogManager.getFormatterLogger(Example.class);
> private final static Logger LOGGER =
> LogManager.getLogger(Example.class);
> public static void main(String[] args) {
> LOGGER.log(ERROR, "{} happened", "Something");
> FORMATTER_LOGGER.log(ERROR, "%s happened", "Something");
> }
> }
> {code}
> {noformat}
> 13:40:35.401 [main] ERROR com.example.Example - {} happened
> 13:40:35.404 [main] ERROR com.example.Example - Something happened
> {noformat}
> After inverting the two constant declarations:
> {noformat}
> 13:41:13.730 [main] ERROR com.example.Example - Something happened
> 13:41:13.732 [main] ERROR com.example.Example - %s happened
> {noformat}
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