Hazelcast logging doesn't work - tomcat7

Question

We followed all the posts and documentation out there but can't get any DEBUG statements generated by Hazelcast.
Hazelcast v.3.4.1 Tomcat 7 application server. Slf4j v.1.7.5
Hazelcast config:
<properties>
<property name="hazelcast.logging.type">slf4j</property>
</properties>
Logback.xml
EDIT: Here is a full logback.xml
<configuration scan="true">
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} %-5level %logger{0} - [%X{sessionID}] - [%X{loginID}] - %msg%n</pattern>
</encoder>
</appender>
<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${catalina.base}/logs/app.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${catalina.base}/logs/app.%d{yyyy-MM-dd}.log</fileNamePattern>
<maxHistory>2</maxHistory>
</rollingPolicy>
<encoder>
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %logger - [%X{sessionID}] - [%X{loginID}] - %msg%n</pattern>
</encoder>
</appender>
<logger name="org.mybatis" level="debug" additivity="false">
<appender-ref ref="FILE" />
</logger>
<logger name="com.hazelcast" level="debug" additivity="false">
<appender-ref ref="FILE" />
</logger>
<root level="warn">
<appender-ref ref="FILE" />
</root>
Seems like something else is needed. No hazelcast logging is visible.
I would appreciate some help.

Answer 1

Do you see somethng like this in the logging?
INFO: [192.168.122.1]:5701 [dev] [3.5.1]
Members [1] {
Member [192.168.122.1]:5701 this
}
Because this is a clear indication that the Hazelcast logging is working correctly. If you don't see this, then there really is a logging problem, otherwise there probably is some kind of log level problem.