[LOG4J2-1969] TcpSocketServer does not replace any “{}” in message

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.2, 2.7
• Fix Version/s: 2.8
• Component/s: Appenders

Environment

Spring boot 1.5.4
java 8

• Assignee: Unassigned
• Reporter: YU Chang
• Created: 06/Jul/17 10:08
• Updated: 22/Feb/19 20:36
• Resolved: 08/Jul/17 15:54

Description

I have a spring boot(v1.5.4) web application which use log4j-2.7 for logging.
It works well when write log message to file or console, but when send message to `TcpSocketServer`, the log server just output the message without the "{}" formatting. for example, for this code:

    logger.info("Request from [{}] to [{}]", ipInfo, reqPath);

The `RollingfileAppender` and `ConsoleAppender` will output:

    INFO  2017-07-06 16:46:07,929 [127.0.0.1][/senten/align] AuthFilter (http-nio-8180-exec-2) Request from [127.0.0.1] to [/senten/align] 

But the `SocketAppender` just ouput:

    INFO  2017-07-06 16:46:07,929 [127.0.0.1][/senten/align] AuthFilter (http-nio-8180-exec-2) Request from [{}] to [{}] 

This is my config with `SocketAppenders` in log4j.xml

        <Appenders>
		<Socket name="socket" host="127.0.0.1" port="9898">
			<SerializedLayout />
		</Socket>
        ........
	</Appenders>

This is my config file `log4j2-socket.xml` for `TcpSocketServer`:

    <Configuration status="WARN">
    	<Appenders>
    		<RollingFile name="default" fileName="Logs/app.log"
    			filePattern="Logs/${date:yyyy-MM}/app-%d{yyyy-MM-dd}-%i.log.gz">
    			<PatternLayout>
    				<Pattern>%-5p %d [%X{ip}][%X{reqPath}] %c{1} (%t) %m %ex%n</Pattern>
    			</PatternLayout>
    			<Policies>
    				<TimeBasedTriggeringPolicy interval = "30" modulate="true"/>
    				<SizeBasedTriggeringPolicy size="200 MB" />
    			</Policies>
    		</RollingFile>
    	</Appenders>
    	<Loggers>
    		<Root level="DEBUG">
    			<AppenderRef ref="default" level="DEBUG" />
    		</Root>
    	</Loggers>
    </Configuration>

And, I use this command for start `TcpSocketServer`:

    java -classpath log4j-core-2.7.jar:log4j-api-2.7.jar:jcommander-1.48.jar org.apache.logging.log4j.core.net.server.TcpSocketServer -p 9898 -c log4j2-socket.xml

What am I doing wrong? How to fix it? Thanks!