You might come across scenarios where you have jaggery implementation in your other WSO2 products. (ex: bpmn- explorer in BPS) . So , when enabling debug logs, there are two things you have to do .
1. Go to jaggery.conf and change log level.
2. Go to management console of your WSO2 product.
2.1 Go to Configure -> Logging
2.2 Under Configure Log4J Appenders change threshold value to DEBUG .