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https://issues.apache.org/jira/browse/LOG4J2-918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14241257#comment-14241257
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Remko Popma commented on LOG4J2-918:
------------------------------------
By design, you can only have one root. You can choose either async or sync, but
you cannot have both in your configuration. However, within a single root
logger you can have multiple appender-refs:
{code}
<Loggers>
<AsyncRoot level="debug" includeLocation="false">
<AppenderRef ref="Socket"/>
<AppenderRef ref="Console" />
</AsyncRoot>
</Loggers>
{code}
Would that work for you?
> Combining Root and AsyncRoot in Xml configuration
> -------------------------------------------------
>
> Key: LOG4J2-918
> URL: https://issues.apache.org/jira/browse/LOG4J2-918
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.1
> Reporter: Kaj Bjurman
> Priority: Minor
>
> Don't know if this is a documentation issue, a configuration bug, or just a
> user error, so I have left many fields empty in this report.
> I'm trying to create an xml configuration where I have asynchronous logging
> to a socket, and synchronous logging to disk.
> The pdf-documentation says:
> http://logging.apache.org/log4j/2.x/log4j-users-guide.pdf
> "Synchronous and asynchronous loggers can be combined in configuration. This
> gives you more
> flexibility at the cost of a slight loss in performance (compared to making
> all loggers asynchronous).
> Use the <asyncRoot> or <asyncLogger> configuration elements to specify the
> loggers that need to
> be asynchronous. The same configuration file can also contain <root> and
> <logger> elements for
> the synchronous loggers."
> .. so I created a configuration file that looks like this:
> {code}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="trace">
> <Appenders>
> <Console name="Console" target="SYSTEM_OUT">
> <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level
> %logger{36} - %msg%n" />
> </Console>
> <Socket name="Socket" host="localhost" port="666"
> immediateFail="false" immediateFlush="true" reconnectionDelayMillis="5000">
> <SerializedLayout />
> </Socket>
> </Appenders>
> <Loggers>
> <Root level="debug" includeLocation="false">
> <AppenderRef ref="Console" />
> </Root>
> <AsyncRoot level="debug" includeLocation="false">
> <AppenderRef ref="Socket"/>
> </AsyncRoot>
> </Loggers>
> </Configuration>
> {code}
> That configuration only leads to logging to the socket appender, and nothing
> to the console.
> Changing the order of the root elements to:
> {code}
> <Loggers>
> <AsyncRoot level="debug" includeLocation="false">
> <AppenderRef ref="Socket"/>
> </AsyncRoot>
> <Root level="debug" includeLocation="false">
> <AppenderRef ref="Console" />
> </Root>
> </Loggers>
> {code}
> Gives console logging, but no logging to the socket.
> Changing the config to:
> {code}
> <Loggers>
> <AsyncRoot level="debug" includeLocation="false">
> <AppenderRef ref="Socket"/>
> </AsyncRoot>
> <Logger name="com" level="debug" includeLocation="false">
> <AppenderRef ref="Console" />
> </Logger>
> </Loggers>
> {code}
> Gives both console and socket logging, for "com" and descendants, but code
> that is logging to another domain than com does not end up in the console.
> I also tried to leave the name empty in the test above, but that doesn't work.
> What's the problem? The documentation, or my understanding of it, or the
> implementation?
> I would really like to have both asynchronous and synchronous root in the
> same configuration.
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