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https://issues.apache.org/jira/browse/LOG4NET-285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stefan Bodewig resolved LOG4NET-285.
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Resolution: Won't Fix
Fix Version/s: (was: 1.3.0)
> Issue with rolling based on a date
> ----------------------------------
>
> Key: LOG4NET-285
> URL: https://issues.apache.org/jira/browse/LOG4NET-285
> Project: Log4net
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 1.2.10
> Environment: windows server 2003,dotnet framework3.5, wcf services
> Reporter: kinnar
> Priority: Minor
> Labels: build
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> Hi,
> We are having 10 programs which are rolling into same log file
> namlely "logger.log".
> Below is configuration of RollingFileAppender which we are using :
> <appender name="RollFile" type="log4net.Appender.RollingFileAppender">
> <threshold value ="ALL"/>
> <file value="C:\logger.log" />
> <param name="LockingModel"
> type="log4net.Appender.FileAppender+MinimalLock" />
> <appendToFile value="true" />
> <maximumFileSize value="1GB" />
> <staticLogFileName value="true"/>
> <maxSizeRollBackups value="5" />
> <datePattern value=".yyyy-MM-dd-tt".log""/>
> <rollingStyle value="Composite" />
> <layout type="log4net.Layout.PatternLayout">
> </layout>
> </appender>
> Our rolling based on date is running at every 12 hour span means
> at 12 Noon and 12 Midnight. Now what is happening when multiple
> programs try to log into log file at the same time when rolling happens
> means
> at 12 noon/midnight, then size of file getting rolled is becoming very
> small compare to original file size(i.e Suppose logger.log is
> around 1 MB at 12 noon, when rolling happens the new rolled file which is
> get
> generated is around 3 KB or somewhat). So, almost data get lost due to this.
> This is basically happening when multiple programs try to log into log
> file at the same time of when rolling happens(means at 12 noon/midnight).
> Debugging Info:
> ============
> I have debug this issue by enabling debugging in log4net. What is happing
> when 2 or more programs try to log into log file at time of roll time means
> at 12 midnight/12 noon, then from first program call RollOverTime() function
> in log4net source code gets called. It will in turn call RollFile() , which
> in turn check whether rolled file with particular date and time exist, if yes
> then its deleting that file and creating new roll file with particular date
> and time and moving content of original log file into new roll log file. Till
> now its fine. But as second request for logging comes at same time means at
> 12 midnight/12 noon , it will also call RolloverTime(), then RollFile(),
> which in turn find rolled file with particular date and time. so, it will
> delete that rolled file with particular and date and create a new roll file
> and move content of original log file into it.At that time original log file
> contains very less data. So, thats why size of rolled log file is becoming
> very low. Very less size of rolled file is a major issue of it .
> All of you might get my whole debugging description described above. Please
> revert back to us on this ASAP as its very important us to go ahead.
> Regards,
> Kinnar
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