More on logging

We're trying to use SLF4j with Freemarker 2.3.16 and we're having a bit 
of trouble. I keep getting:

log4j:WARN No appenders could be found for logger (freemarker.runtime).

This is bizarre, because so far as I can tell, log4j isn't on the 
classpath. We do have log4j-over-slf4j on the classpath, so maybe that's 
where it's coming from. Logger.selectLoggerLibrary(Logger.LIBRARY_NONE) 
seems to fix it, at least for now.

In any case, I saw a thread on this list, July 25, 2010, that 
Logger.selectLoggerLibrary() would support slf4j in 2.3.17. That's cool, 
that will probably do the job.

In the meantime, though, I'd like to urge you NOT to add commons-logging 
as an option to 2.3.17. Commons logging has enormous problems (which 
have been widely reported; a little googling will find them), and it's 
continuing headache to exclude commons logging from projects that are 
based on Maven. If you add a Maven dependency on commons logging to your 
POM, lots of people will have to do backflips to get rid of it. (For 
more on the problem, google "version 99 does not exist"). Just a suggestion.

Thanks. Looking forward to 2.3.17.


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