moving to SLF4J as an API is independent —it's just a better API for logging than commons-logging, was already a dependency and doesn't force anyone to switch to a new log back end.
On 15 August 2014 03:34, Tsuyoshi OZAWA <ozawa.tsuyo...@gmail.com> wrote: > Hi, > > Steve has started discussion titled "use SLF4J APIs in new modules?" > as a related topic. > > http://mail-archives.apache.org/mod_mbox/hadoop-common-dev/201404.mbox/%3cca+4kjvv_9cmmtdqzcgzy-chslyb1wkgdunxs7wrheslwbuh...@mail.gmail.com%3E > > It sounds good to me to use asynchronous logging when we log INFO. One > concern is that asynchronous logging makes debugging difficult - I > don't know log4j 2 well, but I suspect that ordering of logging can be > changed even if WARN or FATAL are logged with synchronous logger. > > Thanks, > - Tsuyoshi > > On Thu, Aug 14, 2014 at 6:44 AM, Arpit Agarwal <aagar...@hortonworks.com> > wrote: > > 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. > -- 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.
