I am using logback 1.2.3 . 

I have added the below dependency to my pom.xml

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>1.2.3</version>
</dependency>

My configuration looks like below

<configuration> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <Target>System.out</Target> <encoder> <pattern>%p [%d{yyyy-MM-dd HH:mm:ss,SSS}] %c{3}:[%C{1}:%M:%L] - [%t] - %m%n</pattern> </encoder> </appender> <root level="INFO"> <appender-ref ref="CONSOLE"/> <appender-ref ref="datadog"/> </root> </configuration>

Filename & line number is not showing up. A question mark is coming. 

INFO [2018-01-12 07:06:54] c.v.s.f.FlowStoreWarmer:[?:?:?] - [FlowStoreWarmer_flow_cache_warmup_thread] - no work to do for cid 19099

Can some one let me know what is going wrong? Do I have add logback-core also as dependency? 

Thanks,