Tomcat 사용 시 Access Log를 기록하는 방법은 다음과 같습니다.

$CATALINA_HOME/conf/server.xml 파일 내용 중 아래 부분의 주석을 제거하신 후 Tomcat을 재 시작하시면 됩니다.

        <!--
        <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs"  prefix="localhost_access_log." suffix=".txt"
                 pattern="common" resolveHosts="false"/>
        -->

 <Valve className="org.apache.catalina.valves.AccessLogValve"
directory="/apps/atlassian/logs" prefix="" suffix=".tomcat2_access.log"
pattern="%t %a %Ts %{userid}r %B %U%q"
fileDateFormat="yyyy-MM-dd"
resolveHosts="false"/>

참조: http://tomcat.apache.org/tomcat-5.5-doc/config/valve.html

• %a - Remote IP address
• %A - Local IP address
• %b - Bytes sent, excluding HTTP headers, or '-' if zero
• %B - Bytes sent, excluding HTTP headers
• %h - Remote host name (or IP address if resolveHosts is false)
• %H - Request protocol
• %l - Remote logical username from identd (always returns '-')
• %m - Request method (GET, POST, etc.)
• %p - Local port on which this request was received
• %q - Query string (prepended with a '?' if it exists)
• %r - First line of the request (method and request URI)
• %s - HTTP status code of the response
• %S - User session ID
• %t - Date and time, in Common Log Format
• %u - Remote user that was authenticated (if any), else '-'
• %U - Requested URL path
• %v - Local server name
• %D - Time taken to process the request, in millis
• %T - Time taken to process the request, in seconds
• %I - current request thread name (can compare later with stacktraces)