[logback-user] FileNamePattern

[Ceki Gulcu]

Hello Neil,

FileNamePattern does not support the %d when used within 
FixedWindowRollingPolicy. Only %i is supported. It's a currentlimitation of the 
code.

I suggest that you enter a jira issue requesting simultaneous support for %d and 
%i. Referencing or copying this thread would set a context for the problem which 
would be helpful.

Cheers,

Neil Lott wrote:
> Hi,
> 
> I'm using a FileNamePattern with a FixedWindowPolicy:
> 
> 
> Here's my appender:
> 
> <appender name="FILE" 
> class="ch.qos.logback.core.rolling.RollingFileAppender">
>         <file>/usr/local/mystro/logs/MSAServer.log</file>
>         <append>true</append>
> 
>         <rollingPolicy 
> class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
>             
> <FileNamePattern>/usr/local/neil/logs/MSAServer.%i.%d{yyyyMMdd-HHmmss}.gz</FileNamePattern> 
> 
>             <MinIndex>1</MinIndex>
>             <MaxIndex>3</MaxIndex>
>         </rollingPolicy>
> 
>         <triggeringPolicy 
> class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
>             <MaxFileSize>1KB</MaxFileSize>
>         </triggeringPolicy>
> 
>         <layout class="ch.qos.logback.classic.PatternLayout">
>             <Pattern>%d{ISO8601} %-5level [%thread] 
> \(%logger{0}.%M:%L\\) - %msg%n</Pattern>
>         </layout>
>     </appender>
> 
> Here's the exception when the file rolls -- I had to alter the rollover 
> method of FixedWindowPolicy in order to catch throwable to see what was 
> going on:
> 
> java.lang.IllegalArgumentException: Cannot convert 3 of 
> typejava.lang.Integer
>     at 
> ch.qos.logback.core.rolling.helper.DateTokenConverter.convert(DateTokenConverter.java:60) 
[snip]

> 
> Is this an intentional restriction to make the file name pattern have %i 
> first and then %d?
> 
> Thanks,
> 
> Neil
> 

-- 
Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch