There are several environment variables that can be set in order to influence how Log4cxx works. They are summarized in the following table:

Environment Variable	Usage
LOG4CXX_DEBUG	Set to the value 'true' to enable internal debugging of Log4cxx. All output goes to stderr. This can be useful to determine why a configuration file is not loading
log4j.configuratorClass	Used to determine what class to use to configure the logging system
LOG4CXX_CONFIGURATOR_CLASS	Used to determine what class to use to configure the logging system. Takes precedence over log4j.configuratorClass
log4j.configuration	Set the file to load to configure the logging system
LOG4CXX_CONFIGURATION	Set the file to load to configure the logging system. Takes precedence over log4j.configuration
LOG4CXX_CONFIGURATION_WATCH_SECONDS	Set how often the configuration file should be checked for changes