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Access logs keep track of access to parts of WSO2 ESB. There are two types of access logs in WSO2 ESB:

  1. Service and REST API invocation access log: tracks when a service or REST API is invoked 
  2. Management Console access log: tracks usage of the Management Console

Service and REST API Invocations Access Log

By default, the service/API invocation access logs are disabled for performance reasons. 

If you want to enable them, change the log level from WARN to INFO for the following entry in the <ESB_HOME>/repository/conf/log4j.properties configuration file.

log4j.logger.org.apache.synapse.transport.http.access=INFO

Once enabled, the service/API invocation access logs will be written into the <ESB_HOME>/repository/logs folder with the default name of http_access_<YYYY>_<MM>_<DD>.log. For example, http_access_2016_08_20.log will be created for activity on August 20, 2016. The log is rotated on a daily basis.

You can customize the format of this access log by using the following properties in the <ESB_HOME>/repository/conf/access-log.properties configuration file:

  • File location:
    access_log_directory=/logs/wso2esblogs
  • File prefix:
    access_log_prefix=http_access_
  • File suffix:
    access_log_suffix=.log
  • File date format: 
    access_log_file_date_format=yyyy-MM-dd
  • Log pattern: 
    access_log_pattern=%{X-Forwarded-For}i %h %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-Agent}i\"
    This default log pattern uses a modified version of the Apache combined log format. The X-Forwarded-For header is appended to the beginning of the usual combined log format to correctly identify the original node that sent the request when requests may go through a proxy such as a load balancer. The X-Forwarded-For header must be present in the incoming request for this to be logged. You can modify this property to use other log patterns as follows:

Management Console Access Log

By default, the Management Console access log is written to the <ESB_HOME>/repository/logs/http_access_management_console_<YYYY>_<MM>_<DD>.log file. It is rotated on a daily basis. 

To customize the Management Console access log, including the location where the file is written and the format, you can edit the <ESB_HOME>/repository/conf/tomcat/catalina-server.xml file. In this file, under "Valves", you can find the following access log configuration where you can modify the org.apache.catalina.valves.AccessLogValve attributes.

<Valve className="org.apache.catalina.valves.AccessLogValve" directory="${carbon.home}/repository/logs"
               prefix="http_access_management_console_" suffix=".log"
               pattern="combined" />

For more information, see AccessLogValve in the Apache Tomcat documentation.  

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