I don't recall whether this was discussed before. I often find our INFO logging to be too sparse for useful diagnosis. A high performance logging framework will encourage us to log more. Specifically, Asynchronous Loggers look interesting. https://logging.apache.org/log4j/2.x/manual/async.html#Performance
What does the community think of switching to log4j 2 in a Hadoop 2.x release? -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.