By default, the Data Source Connector logs all critical errors. For profiling or debugging purposes, you may wish to increase the logging depth, however it must be noted that this will result in slower performance due to additional file I/O.
For Java the logging is controlled using the conf\log4j.properties file which uses the log4j 1.2 properties settings.
For .NET the logging is controlled using the conf\log4net.properties file which uses the log4net 1.2 XML settings.
Further information about property file settings can be found on the Apache Logging Services web site (http://logging.apache.org/)