c99df3c4_nce_Guide___Configuring_Apache__Description
[Directive] JkLogFile [Description] 
Full or server relative path to the Tomcat Connector module log file. It will also work with pipe, by using a value of the form "| ...". The default value is logs/mod_jk.log. Pipes are supported for Apache 1.3 only since version 1.2.16. The default value exists only since version 1.2.20.
The Apache Tomcat Connector - Reference Guide - Configuring Apache
Description