Ceki Culcu Sorry for the empty message I just sent. I pressed the wrong button by mistake.... I have the following SocketAppender that uses the XMLLayout. <appender name="SOCKET" class="ch.qos.logback.classic.net.SocketAppender"> <RemoteHost>localhost</RemoteHost> <Port>7777</Port> <ReconnectionDelay>10000</ReconnectionDelay> <IncludeCallerData>true</IncludeCallerData> <layout class="ch.qos.logback.classic.log4j.XMLLayout"> <LocationInfo>true</LocationInfo> <properties>true</properties> </layout> </appender> I was wondering if it is possible to make a logback client that uses the above SocketAppender talk to a Log4j server. I tried this but the server throws an unknown exception when connection is made... Can SocketAppender and log4j.XMLLayout be combined like in the example above?