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From "Jacob Kjome" <h...@visi.com>
Subject Re: class specific logging level
Date Fri, 08 Jun 2012 17:00:19 GMT

First, you are not setting the level of the appender, but that of the logger 
which can reference any given appender, including your named "Log1" appender.  
So, if you want ERROR level for all classes, then set the "root" logger level 
to ERROR. 

After that, you make a decision of which appenders you want logging to go to 
(disregarding level, as that is the job of the logger - except in regard to 
more advanced configuration where you can set appender level thresholds or use 
filters, but that's beyond our discussion here).  If you want output of all 
classes (again, disregarding level) to go to the "Log1", then you provide a 
reference to "Log1" in the primordial "root" logger.

After that, if you want to lower the level for specific loggers, you can 
specify those as you've done with "com.pkg.MyClass".  Now all classes, 
including "com.pkg.MyClass" will log at the ERROR level, but "com.pkg.MyClass" 
will also provide DEBUG, INFO, and WARN (and SEVERE) logging as well.

This is all very standard stuff.  If you don't experience the above behavior, 
then I would suspect that the Log4j configuration you think you are using 
isn't being used at all.  You might want to use...


This will tell Log4j to report how it is being configured.  You may find that 
some other configuration is being used instead of yours.  Either that, or you 
are not describing what you want clearly enough.


On Fri, 8 Jun 2012 09:15:14 -0700 (PDT)
 aggarwal <akansha.agg.9@gmail.com> wrote:
> If I set the level of Log1 appender to DEBUG, then DEBUG logs of all the
> classes including MyClass are getting logged. If I set it to ERROR, then
> ERROR logs of all the classes including MyClass are getting logged. But what
> I want is - DEBUG logs of only MyClass and ERROR of rest all. Here, my
> motive is to set DEBUG level logging for most important classes helping in
> debugging procedure. 
> <logger name="com.pkg.MyClass">
> 	<level value="DEBUG" />
> </logger>
> private final static Logger logger = Logger.getLogger(MyClass.class);
> This is how a logger is defined in my code. It was my mistake to replace
> "com.pkg.MyClass" with "MyClass". 
> Thanks for "additivity" and "priority" related suggestions.
> Actually, root isn't my concern here. No matter what the level of root and
> appender is, I want DEBUG logs of only MyClass.
> Douglas E Wegscheid wrote:
>>> I want MyClass logs of DEBUG level and all other classes of ERROR in
>>> "log1.log" file as mentioned in logger "Log1". 
>>> ...
>>> whereas if I set the level in appender
>>> "Log1" to DEBUG, I do get the DEBUG logs of Myclass in log1.log.
>> If you set the level of the Log1 appender to DEBUG, you say that you get 
>> the DEBUG logs of Myclass in log1.log. Isn't that what you want?
> -- 
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