Hi all.
I've got a beginner question: Are there any best practices for how to do
logging from a task? Essentially I want to log warning messages under
certain conditions in my map and reduce tasks, and be able to review them
later.

Is good old commons-logging using the TaskLogAppender the best way to solve
this? I assume I'd have to configure it to log to StdErr to be able to see
the log messages in the jobtracker webapp. The Reporter would be useful to
track statistics but not for something like this. And the JobHistory class
and history logs are intended for internal use only?

Thanks a lot,
Per

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