Talend Data Preparation logs allows you to analyze and debug the activity of Talend Data Preparation.
Talend Data Preparation logs are located in <Data_Preparation_Path>/data/logs/app.log.
To configure the settings of your log files, edit the <Data_Preparation_Path>/config/log4j2.xml file:
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For more information on how to set the log4j information level, see http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html.
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For more information on how to set the log rotation, see https://logging.apache.org/log4j/2.x/manual/configuration.html#AutomaticReconfiguration.