If “appender-ref ref=”SOCKET” is defined in <logger> without any other appender-ref, then callerdata is omitted regardless of the value of SocketAppenders includeCallerData property. When I added a second appender-ref for example “appender-ref ref=”CONSOLE” the callerdata will be logged.

configuration in logback.xml

<appender name="SOCKET" class="ch.qos.logback.classic.net.SocketAppender">
<remoteHost>$

</remoteHost>
<port>$

</port>
<reconnectionDelay>30000</reconnectionDelay>
<includeCallerData>true</includeCallerData>
</appender>

<logger name="INTE-TECH" level="INFO">
<appender-ref ref="SOCKET"/>
</logger>

<root level="$

" />