Github user srdo commented on the issue:
https://github.com/apache/storm/pull/2441
I think this is the wrong approach. We should exclude slf4j-log4j12 from
whichever dependency is including it instead. We want all logging to go to
log4j 2 and our worker log, making this change would mean that all logging done
to the log4j12 API is lost unless the user adds a log4j12 configuration file to
Storm.---
