[logback-dev] [JIRA] Commented: (LBCORE-147) RollingPolicy MaxHistory not deleting old files

Greg Thomas (JIRA) noreply-jira at qos.ch
Wed Aug 17 22:57:16 CEST 2011

    [ http://jira.qos.ch/browse/LBCORE-147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12084#action_12084 ] 

Greg Thomas commented on LBCORE-147:

You're right, in that I know think that implementing the "maxHistoryGap" solution I referred to earlier is the right solution. 

Instead, I think that when a new log file is created, rather than just delete the "oldest+1" file, it's necessary to do a full directory scan, and delete all those that are too old - that copes for longer quiet periods.

Of course, it's complicated because your not just dealing with files called, e.g. "2011-02-12.log", but they could be called "2011/02/12/data.log" - i.e. it's necessary to do a recursive directory scan. 

Ceki; if you think that solution is acceptable, let me know and I'll see if I can work on a fix for it.

PS. For those looking the other (working) appender mentioned in this ticket, org.apache.log4j.appender.TimeAndSizeRollingAppender is, despite the name, not part of the Apache project - you can find more details on this at http://www.simonsite.org.uk/ - from a quick glance, it too appears to "scavenge" older files on a configurable interval. I don't think that's necessary in this case; older files only need to be scavenged when a new one is created.

> RollingPolicy MaxHistory not deleting old files
> -----------------------------------------------
>                 Key: LBCORE-147
>                 URL: http://jira.qos.ch/browse/LBCORE-147
>             Project: logback-core
>          Issue Type: Bug
>          Components: Rolling
>    Affects Versions: 0.9.18
>         Environment: linux 2.6.18 64bits apache-tomcat-6.0.20 java/jre1.6.0_18
>            Reporter: Rafael Diaz Maurin
>            Assignee: Ceki Gulcu
>         Attachments: TimeBasedRollingWithArchiveRemovalTest.java
> The MaxHistory does not do the trick : the old files are not deleted at all :
> cat logging.xml
>  <appender name="IDP_ACCESS" class="ch.qos.logback.core.rolling.RollingFileAppender">
>         <File>/shibboleth-idp/logs/idp-access.log</File>
>             <Append>false</Append>
> 	<ImmediateFlush>true</ImmediateFlush>
>        <RollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
>             <FileNamePattern>/shibboleth-idp/logs/old/idp-access-%d{yyyy-MM-dd_HH-mm}.log.gz</FileNamePattern>
> 	    <MaxHistory>3</MaxHistory>
>         </RollingPolicy>
>         <layout class="ch.qos.logback.classic.PatternLayout">
>             <Pattern>%msg%n</Pattern>
>         </layout>
>     </appender>

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