@Eristocrat  @Eristocrat  Logging varies by class.  Some classes don't produce anything beyond INFO level, while others will produce even TRACE level logging.  With TRACE level being the highest level, you will get all possible logging by using it. Do you have a screenshot of the exception you are seeing?  At time of exception, did you find anything logged in the NiFi user and/or app logs? Thanks, Matt ... View more