Re: [logback-user] "#logback.classic pattern:" spam in 1.0.2

2 May 2012

      Hi Benoit,

My response can be found below.

On 02.05.2012 09:53, tsuna wrote:
...
Hi list,
I just upgraded from logback-{core,classic} 1.0.0 to 1.0.2 and now
whenever I start my application I see a message like this one:
#logback.classic pattern: %msg%n
in my logs.  Like, really, it's literally logging the format string
itself.  Has a debug statement slipped in the 1.0.2 release?
Here's the configuration of the app, in case you need it:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
   <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
     <encoder>
       <pattern>
         %d{ISO8601} %-5level [%thread] %logger{0}: %msg%n
       </pattern>
     </encoder>
   </appender>
<appender name="ACCESS"
class="ch.qos.logback.core.rolling.RollingFileAppender">
     <file>logs/access.log</file>
     <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
       <fileNamePattern>logs/access.%d{yyyy-MM-dd}.%i.log.gz</fileNamePattern>
       <timeBasedFileNamingAndTriggeringPolicy
class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
         <maxFileSize>1GB</maxFileSize>
       </timeBasedFileNamingAndTriggeringPolicy>
       <maxHistory>45<!-- days --></maxHistory>
     </rollingPolicy>
     <encoder>
       <pattern>%msg%n</pattern>
     </encoder>
   </appender>
<logger name="access.log" additivity="false">
     <appender-ref ref="ACCESS"/>
   </logger>
   <root level="info">
     <appender-ref ref="STDOUT"/>
   </root>
</configuration>
When I start my app, before my main() starts, I see this on the STDOUT
console logger:
#logback.classic pattern: %d{ISO8601} %-5level [%thread] %logger{0}: %msg%n
This can be fixed by telling the PatternLayout not to print the output 
pattern string as a header. Here is the modified ConsoleAppender definition.

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
   <encoder>
     <pattern>%d{ISO8601} %-5level [%thread] %logger{0}: %msg%n</pattern>

    <-- do not print pattern as a header -->
    <outputPatternAsPresentationHeader>
      false
    </outputPatternAsPresentationHeader>
   </encoder>
</appender>
...
And this gets added to my logs/access.log:
#logback.classic pattern: %msg%n
Here is the modified RollingFileAppender defintion:

<appender name="ACCESS"
           class="ch.qos.logback.core.rolling.RollingFileAppender">
   <file>access.log</file>
   <rollingPolicy
           class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
     <fileNamePattern>access.%d{yyyy-MM-dd}.%i.log.gz</fileNamePattern>
       <timeBasedFileNamingAndTriggeringPolicy
         class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
       <maxFileSize>1GB</maxFileSize>
       </timeBasedFileNamingAndTriggeringPolicy>
       <maxHistory>45<!-- days --></maxHistory>
   </rollingPolicy>
   <encoder>
     <pattern>%msg%n</pattern>

     <-- do not print pattern as a header -->
     <outputPatternAsPresentationHeader>
       false
     </outputPatternAsPresentationHeader>
    </encoder>
</appender>

HTH,

-- 
Ceki
http://twitter.com/#!/ceki