Tibco made some changes to the way logging works on 7.8 and above and intoduced Log4J2. There is a documentation bug made me waste a lot of time today so posting here to help others not fall for this. The following Server admin section describes how to change the logging level for a server or node that is not running:
The documentation says a file called logging.properties should be created if it doesn't exist. This is incorrect. The correct file name should be logging-levels.properties. The documentation also explains how to set the ActiveConfig property when creating logging-levels.properties (if it does not exist). However none of the templates provided have this property set. So the documentation should say that this property should be added at the top of the file when logging-levels.properties does not exist.