ZK Configuration Reference/zk.xml/The Library Properties/org.zkoss.util.logging.config.file

Property:

org.zkoss.util.logging.config.file

Applicable:
 globally in zk.xml via <library-property>
 not as <custom-attribute>

Default: none
[Since 6.0.0]

It specifies the logging configuration file which is used to configure the logging of ZK internal functions. You generally don't need it unless you'd like to know how ZK operates internally. For more information, please refer to ZK Developer's Reference: Logger.

For example,

<library-property>
	<name>org.zkoss.util.logging.config.file</name>
	<value>conf/zk-log.properties</value>
</library-property>

If a relative path is specified, it will look for the class path first. If not found, it will assume it is related to the current directory, i.e., the directory specified in the system property called user.dir.

You could specify an absolute path, such as /usr/jetty/conf/zk-log.properties, if you are not sure what the current directory is.