I have just upgraded to fop 0.93 from 0.20.5, on Gentoo Linux, and
I'm now running into some issues whenever I try to process files
which worked prior to the upgrade.
Running fop, I get the following error:
log4j:WARN No appenders could be found for logger
(org.apache.fop.render.RendererFactory).
log4j:WARN Please initialize the log4j system properly.
An empty output file is generated, then deleted. This error is thrown
even if I just run fop by itself (I get that error, followed by a usage).
I can see three possible causes:
1) It's a Gentoo issue, and not a FOP issue.
2) It's not a log4j issue (it is reported as a warning after all),
and something has changed which is causing some other failure
which can't be logged. Setting up log4j will tell me what the
real problem is.
3) log4j needs to be setup somehow, which will fix the problem.
Assuming 2 or 3, how do I setup a suitable log4j configuration file
and pass it to fop when running it from the command line?
Thanks,
Sam.
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