[logback-user] logging output duplicated

Chris Cheshire cheshirator at gmail.com
Mon Dec 1 20:50:34 CET 2008


What I want is only ERROR logging from the external libraries (eg
Stripes), while having DEBUG from my own.

Do I need to define it as :

<root level="ERROR">
  <appender-ref ref="EMAIL" />

<logger name="foo" level="DEBUG" additivity="false">
  <appender-ref ref="EMAIL" />
  <appender-ref ref="FILE"  />

Regarding the additivity, why are INFO messages being logged by the
root logger when its threshold is ERROR? Shouldn't it just be ERROR
getting picked up by that section, even with the additivity on?



On Mon, Dec 1, 2008 at 3:48 AM, Ceki Gulcu <ceki at qos.ch> wrote:
> Hello Chris,
> As Robert mentioned, appenders are inherited cumulatively from the logger tree,
> unless the additivity flag of a given logger is set to false.
> Since you have set the bufferSize of SMTPAppender (as mentioned in a previous
> message), setting the root logger level to DEBUG and attaching both EMAIL and
> FILE appender to it should cover your needs. For example,
>   <root level="DEBUG">
>     <appender-ref ref="EMAIL" />
>     <appender-ref ref="FILE" />
>   </root>
> HTH,
> Chris Cheshire wrote:
>> In my webapp I am trying to send emails only on errors, with
>> everything else logged to a file. I am using logback under slf4j, with
>> the log4j/slf4j bridge for the external libraries that normally use
>> log4j.
>> My configuration file is reloaded in the servlet context init (using
>> the Joran configurator example from the documentation) so I can set
>> some system properties used in the appenders (like the context name).
>> The logging config has :
>>   <root level="ERROR">
>>     <appender-ref ref="EMAIL" />
>>     <appender-ref ref="FILE" />
>>   </root>
>>   <logger name="foo" level="DEBUG">
>>       <appender-ref ref="FILE" />
>>   </logger>
>> *Everything* not of log level ERROR coming from foo is getting logged
>> twice. Why? I've pored over Chapter 2 of the documentation and it
>> seems to describe the opposite of what is happening. The level for foo
>> will ideally swap between DEBUG and INFO, but I can't have things
>> logged twice all the time. How do I fix this?
>> Thanks
>> Chris
> --
> Ceki Gülcü
> Logback: The reliable, generic, fast and flexible logging framework for Java.
> http://logback.qos.ch
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