samoa-samza/src/main/resources/log4j.xml

<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <appender name="RollingAppender" class="org.apache.log4j.DailyRollingFileAppender">
    <param name="File" value="${samza.log.dir}/${samza.container.name}.log" />
    <param name="DatePattern" value="'.'yyyy-MM-dd" />
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %c{1} [%p] %m%n" />
    </layout>
  </appender>

  <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d [%t] %-5p %c (%F:%L) - %m%n" />
    </layout>
  </appender>

  <category name="com.yahoo.labs" additivity="false">
    <priority value="info" />
    <appender-ref ref="CONSOLE" />
  </category>

  <root>
    <priority value="info" />
    <appender-ref ref="RollingAppender" />
  </root>
</log4j:configuration>