date in the log file name - log4net

I want my logfile to end up like this :
2015-04-23.log (YYMMDD.log)
<root>
<level value="DEBUG" />
<appender-ref ref="RollingFileAppender" />
</root>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="logs\CTI\ServiceName" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="20MB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception" />
</layout>
</appender>
After running the code, the log file comes up as ServiceName_2015-04-23.log.2015-04-23.
What is the issue?


The appender should look like this:
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="logs\CTI\ServiceName\" />
<datePattern value="yyyy-MM-dd'.log'" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="20MB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception" />
</layout>
</appender>
The key is the datePattern where we add '.log' to the pattern.
Two years later... Better late than never.


You use rollingStyle=date, so log4net adds date in the end of file name.
You can find useful config examples for RollingFileAppender class here.

Related

log4net not creating new file with datetime stamp

I wanted my log file to be create for each date and if the log got to be bigger then 100mb then it will create a new file. Below is my setting and it will not create a new file.
<log4net>
<root>
<level value="INFO" />
<appender-ref ref="FileAppender" />
</root>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="D:\inetpub\wwwroot\COTTProduction\ServiceLogs\COTT.log" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="100MB" />
<datePattern value="_yyyyMMdd.log" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger - %message%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="INFO" />
<levelMax value="FATAL" />
</filter>
</appender>
</log4net>

Maxsizerollbackups not working

I have to delete logs older than 2 days. My configuration is
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value=".\Logs\abc_" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<staticLogFileName value="false" />
<rollingStyle value="Date" />
<datePattern value="yyyy.MM.dd'.log'" />
<appendToFile value="true" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="[%property{log4net:HostName}] %date [%thread] [%-5level] %logger -- %message%newline" />
</layout>
</appender>
But this doesnt seem to work. Please help!

How do I configure log4net to append the datetime at the time of rollover?

Here is my appender:
<appender name="ApplicationRollingFile" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="logs/application.log" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<preserveLogFileNameExtension value="true"/>
<datePattern value=".yyyy-MM-dd-hhmmss" />
<maxSizeRollBackups value="50" />
<maximumFileSize value="500KB" />
<staticLogFileName value="false" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %level %logger %C.%M --- %message --- %newlineTrace:%newline %stacktrace%newline" />
</layout>
</appender>
What it currently outputs is:
application.time-logging-started.1.log
application.time-logging-started.2.log
application.time-logging-started.3.log
what I want is:
application.time-of-first-rollover.log
application.time-of-second-rollover.log
application.time-of-third-rollover.log
can this be done? if so, how?

It seems your file element is using a PatternString for the file name, the rolling file appender does already use a conversion for name. There is no need to override the default working.
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
<file value="logs\" />
<datePattern value="yyyy-MM-dd-hhmmss'.log'" />
<staticLogFileName value="false" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="50" />
<maximumFileSize value="500KB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>

Generate identical files from log4net

Similar question to here but slightly different
Like the attached link I am trying to get log4net to output to multiple (x2) files.
As opposed to the link I am looking to have the same information sent to both files. For some reason only the first log file is being generated (Logs.log) and not the second (LogsTest.log)
Can anyone shine some light on this for me please?
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="Logs.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<threshold value="INFO" />
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="INFO" />
<levelMax value="OFF" />
</filter>
<maxSizeRollBackups value="30" />
<maximumFileSize value="50MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %P{url} %P{usr} %P{addr} – %message%newline" />
</layout>
</appender>
<appender name="RollingFileAppender1" type="log4net.Appender.RollingFileAppender">
<file value="LogsTest.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<threshold value="INFO" />
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="INFO" />
<levelMax value="OFF" />
</filter>
<maxSizeRollBackups value="30" />
<maximumFileSize value="50MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger %P{url} %P{usr} %P{addr} – %message%newline" />
</layout>
</appender>
<logger name="PlaceGen">
<level value="ALL" />
<appender-ref ref="RollingFileAppender" />
<appender-ref ref="RollingFileAppender1" />
</logger>
</log4net>

Would have been smart to have the local operator to restart the application first

log4net ForwardingAppender threshold

I need to configure logger to write messages to several appenders with different Log Levels.
For ex. I want RefreshDataService to log detailed info to TransportFileAppender and Warnings and Errors to RollingFileAppender.
Also, I'm using buffering to improve logging performance.
I setup FilteredFileLog appender to forward Warnings to FileLog->RollingFileAppender.
But for RefreshDataService logger, all log messages including debug and Info getting logged to FileLog.
Can you help me to configure the RefreshDataService logger to log only Warn+ messages to FileLog? Thanks.
Below is excerpt from my log4net config.
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="${TEMP}\logs\client\${ENV}\client.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="4096KB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level [%property{ENV}] [%property{UID}] %logger - %message%newline" />
</layout>
</appender>
<appender name="TransportAppender" type="log4net.Appender.RollingFileAppender">
<file value="${TEMP}\logs\client\${ENV}\client.comm.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="4096KB" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
</layout>
</appender>
<appender name="DetailedTransportLog" type="log4net.Appender.BufferingForwardingAppender">
<threshold value="DEBUG" />
<bufferSize value="200" />
<appender-ref ref="TransportAppender" />
</appender>
<appender name="FileLog" type="log4net.Appender.BufferingForwardingAppender">
<bufferSize value="20" />
<lossy value="false" />
<appender-ref ref="RollingFileAppender" />
</appender>
<appender name="FilteredFileLog" type="log4net.Appender.ForwardingAppender">
<threshold value="WARN" />
<appender-ref ref="FileLog" />
</appender>
<logger name="RefreshDataService" >
<level value="DEBUG" />
<appender-ref ref="FilteredFileLog" />
<appender-ref ref="DetailedTransportLog" />
</logger>

You can use a level range filter on the appender:
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="WARN" />
<levelMax value="FATAL" />
</filter>
<filter type="log4net.Filter.DenyAllFilter" />
My understanding is that the Threshold property is used tell the appender to flush the buffer when messages of a certain level are logged. This way you can make for instance sure that errors are written immediately to the database.

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