I can get a simple Java app stdout (deployed using cf push JavaClass) to go to firehose as logging messages. However, when I deployed a Spring Boot app, I don't get the logging (to stdout) messages from the firehose. If I just ran the Spring Boot app alone (using java -jar SpringBootApp.jar instead of cf push SpringBootApp.jar), I could get the messages coming out in the console or log file that I configured through log4j. System.out also works fine in the console. So, why stdout doesn't work from a Spring Boot app for firehose collection? How is it different from a plain Java app which works fine for firehose?

Thanks!