org.zkoss.util.logging.config.file
From Documentation
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>
ZK looks for the configuration file with the order below: 1. in the class path 2. If the path is relative, it will assume it is relatuve to the directory specified in the system property called user.dir. If the path is absolute, ZK looks from the system root.
You could specify an absolute path, such as /usr/jetty/conf/zk-log.properties
, if you are not sure what the current directory is.