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Posted to user@storm.apache.org by Junguk Cho <jm...@gmail.com> on 2016/08/26 03:14:29 UTC

Question about logwriter

Hi,

When I ran a topology, it always created a process called "LogWriter" per
worker.
LogWriter seemed to write log into file when worker call
"system.out.println" or "LOG.xxxx" based on configuration in log4j2.
To send log info from a worker to a LogWriter, it seemed to use UDP.

Is it right?

Is there a configuration to enable or disable this?
Does it affect overall performance?

Thanks,
Junguk