Hi,
I am trying to use logback+slf4j for logging in my Apache Tomcat webapp.
Apache Tomcat version : 9.0.2
Logback Version : 1.2.3
OS : RHEL 6.9 (Santiago)
I have placed the slf4j and logback JAR files in WEB-INF/lib folder of the webapp.
I have the following logback.xml file contents. This file is in WEB-INF/classes :
<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true">
<property name="logdir" value="/tmp"/>
<property name="processlogfile" value="mycomp-webapp.log"/>
<statusListener class="ch.qos.logback.core.status.NopStatusListener" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<!--Pattern>%date{yyyy-MM-dd'T'HH:mm:ss.SSSXXX} - [%thread] - LEVEL=%-5level - %logger{36} - %msg%n</Pattern-->
<Pattern>%msg%n</Pattern>
</encoder>
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>TRACE</level>
</filter>
</appender>
<appender name="PROCESS" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${logdir}/${processlogfile}</file>
<rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
<fileNamePattern>${logdir}/${processlogfile}.%d{yyyy-MM-dd}.%i
</fileNamePattern>
<maxHistory>10</maxHistory>
<maxFileSize>10MB</maxFileSize>
</rollingPolicy>
<encoder>
<Pattern>%date{yyyy-MM-dd'T'HH:mm:ss.SSSXXX} - [%thread] - LEVEL=%-5level - %logger{36} - %msg%n</Pattern>
</encoder>
</appender>
<logger name="com.mycomp" level="TRACE">
<appender-ref ref="PROCESS"/>
<appender-ref ref="STDOUT"/>
</logger>
<root level="TRACE">
<appender-ref ref="STDOUT"/>
<appender-ref ref="PROCESS"/>
</root>
</configuration>
The log file is created in /tmp (as defined by the configuration above), however, it is empty. And I have lots of trace messages in my webapp. I thought atleast the console appender messages should get logged to catalina.out, but that is also not the case.
At Tomcat startup, I am able to see logback framework is picking up the logback.xml file from the WEB-INF/classes folder and so on, but just no hint of any messages being logged.
Regards,
Neeraj
