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http://jira.qos.ch/browse/LBCORE-70?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=10949#action_10949
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Ceki Gulcu commented on LBCORE-70:
----------------------------------
As mentioned above, compression in prudent mode is not supported. Although
theoretically possible, supporting compression in prudent mode would require
heavier synchronization between the various appender instances. Given that it
would entail a lot work, I don't see it happening anytime soon.
> Compressing log files does not work correctly
> ---------------------------------------------
>
> Key: LBCORE-70
> URL: http://jira.qos.ch/browse/LBCORE-70
> Project: logback-core
> Issue Type: Bug
> Components: Rolling
> Affects Versions: 0.9.11
> Environment: JVM 1.6.10
> Windows 2003 Server
> GigaSpaces 6.0
> Reporter: Alain Oberdörfer
> Assignee: Ceki Gulcu
> Fix For: 0.9.12
>
>
> In our environment compressing log files does not work correctly.
> As example here is the logger configuration:
> <appender name="rdf-api-debug-file-appender"
> class="ch.qos.logback.core.rolling.RollingFileAppender">
> <append>true</append>
> <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
> <level>debug</level>
> </filter>
> <rollingPolicy
> class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
>
> <fileNamePattern>D:/Temp/rdf-files/logs/%d{yyyy-MM-dd}/debug/rdf-api-debug.log.gz</fileNamePattern>
> </rollingPolicy>
> <layout class="ch.qos.logback.classic.PatternLayout">
>
> <pattern>%date,%-5level,%logger,%thread,%message%n</pattern>
> </layout>
> </appender>
> At Nov, 5th I see a directory "D:/Temp/rdf-files/logs/2008-11-04/debug" with
> the following files (and time of last modifucation):
> rdf-api-debug.log, November 05, 2008, 12:12:26 AM
> rdf-api-debug.log855980476945031.tmp, November 05, 2008, 12:11:52 AM
> rdf-api-debug.log856014875320881.tmp, November 05, 2008, 12:12:26 AM
> rdf-api-debug.log.gz, November 05, 2008, 12:11:53 AM
> The first three files and the log file in the .gz-archive have all the same
> size.
> So compression works, but the original log file and the temporary files are
> not deleted.
> Our application uses several threads, perhaps this causes the problem.
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