Target:
<targets>
<target name="file" xsi:type="File" layout="${longdate} ${level} ${message} ${exception}" fileName="${basedir}/log.txt" archiveAboveSize="10485760" />
</targets>
When I call Logger.Error("some message", e), where e is some exception object, it only logs the message, not the exception information. I need it to output exception message and stack trace. Any ideas what I am doing wrong?
Try to use ${exception:innerFormat=Message,StackTrace}. Here is the documentation.
I've found ${exception:format=tostring} to be the best format for logging full details.
NLog - How to Log Exceptions
Yep try adding
includeSourceInfo="true"
to your target file, like;
<target name="viewer"
xsi:type="NLogViewer"
includeSourceInfo="true"
address="udp://127.0.0.1:9999" />
Related
I want to NLog to ignore certain messages using filters.
from my log file -
2020-07-15 13:18:53.3291 ERROR MyAppName:MyAppName Some other error
2020-07-15 13:18:53.3291 ERROR MyAppName:MyAppName.BusinessLogic.Notification.ProcessorControl Unknown : Unable to connect for notification control.
2020-07-15 13:18:53.3291 ERROR MyAppName:MyAppName.BusinessLogic.Notification.ProcessorControl Exception Occurred in Unknown : AggregateException One or more errors occurred.
2020-07-15 13:18:53.3291 ERROR MyAppName:MyAppName Some other error
from Nlog.config file -
<target xsi:type="File"
name="file"
fileName="${var:basedir}/Logs/MyAppName-${shortdate}.log"
layout="${longdate} [${event-context:item=CC} ${event-context:item=Workstation} ${event-context:item=User} ${event-context:item=IL}] ${level:uppercase=true} ${logger} ${message} ${onexception: ${exception:format=shortType,message,method:maxInnerExceptionLevel=5:innerFormat=shortType,message,method}}" >
</target>
...
<logger name="MyAppName:*" minlevel="Error" writeTo="file" >
<filters>
<when condition="contains('${message}','MyAppName.BusinessLogic.Notification')" action="Ignore" />
<!--<when condition="contains('${message}','*MyAppName.BusinessLogic.Notification*')" action="Ignore" />-->
</filters>
</logger>
I added filter to ignore any messages that may contain the string
"MyAppName.BusinessLogic.Notification" but it's not working.
I also tried with *MyAppName.BusinessLogic.Notification* as in the commented line - but my log file is still filled with these messages.
Can anyone please guide how can I fix this?
One more question -
Doesn't $message represents complete error message, like this from log file -
MyAppName:MyAppName.BusinessLogic.Notification.ProcessorControl Unknown : Unable to connect for notification control.
Thank you!
"MyAppName.BusinessLogic.Notification" is probably not in your ${message}, but it's your logger name (${logger})
${message}
When writing a log event, here are some example of ${message}
logger.Info("My message"); - ${message} yields "My message"
logger.Info("Order {0}", 123); - ${message} yields "Order 123"
logger.Info("Order {OrderId}", 123); - ${message} yields "Order 123". Structured style, read more here. In this case you have also ${event-properties:OrderId} which yields 123.
Note: when using the ASP.NET Core integration , read logger.LogInformation instead of logger.Info
${logger}
The logger name, examples:
LogManager.GetLogger("logger1"); - ${logger} yields "logger1"
LogManager.GetCurrentClassLogger(); - ${logger} yields something like "MyClassNamespace.MyClass"
Injected ILogger<MyClass> - ${logger} yields something like "MyClassNamespace.MyClass" - this in case you're using the ASP.NET Core integration.
Filtering
It's easy to filter on the logger name, it's built into the <logger> rule. The name attribute should be read as "filter on name" - * and ? wildcards are supported.
Example:
<rules>
<logger name="MyAppName.BusinessLogic.*" minlevel="Error" writeTo="ErrorWithBusinessLogicStuffTarget" />
Read more here
Notes
When filtering the final attribute could be handy. For all options, see here
You could also use the <when> to filter with the ${logger}, but that's harder to maintain and less performant.
You are writing a rule so you have to wrap it around the <rules></rules> tag. and also use name="*" in place of name="MyAppName:*".
Try the code below;
<rules>
<logger name="*" minlevel="Error" writeTo="file" >
<filters>
<when condition="contains('${message}','MyAppName.BusinessLogic.Notification')" action="Ignore" />
<!--<when condition="contains('${message}','*MyAppName.BusinessLogic.Notification*')" action="Ignore" />-->
</filters>
</logger>
</rules>
I'm having an issue where I need my users to be able to run my application without administrator rights, but at the same time, I need NLog to be able to create it's log files, which it needs administrator rights to create them in the same folder the application is installed in.
I'm trying to create a directory under the application directory, named Logs, and give everyone-modify permissions with inno setup. I'm going to set up my NLog config to write to this new Logs folder instead of the application directory, so even when the application is run by non-administrators, NLog has sufficient privileges to create the logs.
My question is, is this the proper way to do this? I'm not very experienced with NLog or InnoSetup, so I'm not sure if there is something I'm missing, or if this will possibly create security problems?
I have my NLog config section set up like so
NLog
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<targets>
<target name="el" xsi:type="EventLog" log="ASI" layout="${message} ${exception:innerFormat=tostring:maxInnerExceptionLevel=10:format=tostring}" />
<target name="fl" xsi:type="File" fileName="Logs\iDocClientLog.log" layout="${date}: ${message} ${exception:innerFormat=tostring:maxInnerExceptionLevel=10:format=tostring}" />
</targets>
<rules>
<logger name="*" minlevel="Debug" writeTo="el,fl" />
</rules>
</nlog>
And my InnoSetup installer script Dirs section is like this
InnoSetup
[Dirs]
Name: "{app}\Logs"; Permissions: everyone-modify
If I have the following in my services-config.xml file for setting up BlazeDS log file on a linux server, where does it save the log file? Or, does the output show up by default in Flash Builder 4.6 (e.g. no further info in log file)?
I've been trying to figure this out reading
http://livedocs.adobe.com/blazeds/1/blazeds_devguide/help.html?content=services_logging_3.html
but haven't been able to figure it out. I must be missing something obvious. Any advice appreciated.
<logging>
<target class="flex.messaging.log.ConsoleTarget" level="Error">
<properties>
<prefix>[BlazeDS] </prefix>
<includeDate>true</includeDate>
<includeTime>true</includeTime>
<includeLevel>true</includeLevel>
<includeCategory>true</includeCategory>
</properties>
<filters>
<pattern>Endpoint.*</pattern>
<pattern>Service.*</pattern>
<pattern>Configuration</pattern>
</filters>
</target>
</logging>
Is there a way I can specify a location for the log file to be written?
Taken from the link you provided:
Setting the logging target
By default, the server writes log messages to System.out. In the class
attribute of the target element, you can specify
flex.messaging.log.ConsoleTarget (default) to log messages to the
standard output, or the flex.messaging.log.ServletLogTarget to log
messages to the default logging mechanism for servlets for your
application server.
So you either have to configure logging in your application server (for Tomcat: http://tomcat.apache.org/tomcat-7.0-doc/logging.html) or use something like log4j in your servlet.
services-config.xml should then look something like this:
<target class="flex.messaging.log.ServletLogTarget" level="warn">
<properties>
<prefix>[BlazeDS] </prefix>
<includeDate>true</includeDate>
<includeTime>true</includeTime>
<includeLevel>true</includeLevel>
<includeCategory>true</includeCategory>
</properties>
<filters>
<pattern>Endpoint.*</pattern>
<pattern>Service.*</pattern>
<pattern>Message.*</pattern>
<pattern>DataService.*</pattern>
<pattern>Configuration</pattern>
</filters>
</target>
</logging>
Sidenote: We use log4j and spring-flex, which provides org.springframework.flex.core.CommonsLoggingTarget to handle BlazeDS output.
services-config.xml
<logging>
<target class="org.springframework.flex.core.CommonsLoggingTarget" level="debug">
<properties>
<categoryPrefix>blazeds</categoryPrefix>
</properties>
</target>
</logging>
log4j.properties
log4j.appender.myAppLog=org.apache.log4j.RollingFileAppender
log4j.appender.myAppLog.File=${catalina.base}/logs/myAppLog.txt
log4j.appender.myBlazeLog=org.apache.log4j.RollingFileAppender
log4j.appender.myBlazeLog.File=${catalina.base}/logs/myBlazeLog.txt
log4j.rootLogger=DEBUG,myAppLog
log4j.logger.blazeds=ALL,myBlazeLog
My NLog targets is like this:
<targets>
<target xsi:type="Console" name="console"
layout="${longdate}|${level}|${message}" />
<target xsi:type="File" name="ErrorLog" fileName="${basedir}/error.txt"
layout="${longdate}
Trace: ${stacktrace}
${message}" />
<target xsi:type="File" name="AccessLog" fileName="${basedir}/access.txt"
layout="${shortdate} | ${message}" />
</targets>
But this causes problems if the user isn't an admin on their machine, because they will not have write access to "Program Files". How can I get something like %AppData% to NLog instead of BaseDir?
You're looking for the NLog special folders.
Example:
...fileName="${specialfolder:folder=ApplicationData}/Program/file.txt"...
Oren's answer should be the right answer. However, for the life of me I couldn't get it to work with my .NET 4.0 website using nLog 2.0.0.0. I ended up using simply
fileName="${basedir}app_data\logs\${shortdate}.log"
${specialfolder:ApplicationData} also works
The previous answers helped solve the problem I was having, but a couple of years later and the solution is now somewhat different under v4.3. The directory and filename are combined with the path.
#theGecko's link is still current for the syntax, but the page is deficient of an example:
https://github.com/nlog/NLog/wiki/Special-Folder-Layout-Renderer
The following example would write the file myLog.log to the current users application data roaming directory C:\USers\current.user\AppData\Roaming\My\Path\Somewhere:
fileName="${specialfolder:dir=My/Path/Somewhere/:file=myFile.log:folder=ApplicationData}"
For logging to the project directory:
While the previous answers work for the original question, searching for how to log to the project APP_DATA directory leads to this question. And while bkaid's answer works for ASP.NET and for using the APP_DATA folder specifically, for .NET Core and .NET 5 the solution is a bit different, because that motif has been abandoned in favor of defining a wwwroot folder for only those things which should be served, and the remainder being private. The answer for .NET Core/5, then, is to write to the solution root directory:
First, ensure the NLog.Web.AspNetCore assembly is added to nlog.config:
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
</extensions>
Then use one of the layout renderers provided by that extension, in this case ${aspnet-appbasepath} which references the solution root directory:
<targets>
<target name="file"
type="File"
xsi:type="File"
fileName="${aspnet-appbasepath}/log/${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}"/>
</targets>
This will write the file to <solution folder>/log/2021-07-01.log, which will never be served by the public-facing website. Other layout renderers provided by this assembly are listed on the NLog website.
I was trying to add the date to my log file name and I was able to make it work by following the few suggestions I've found in stackoverflow. Everything works fine but for some reason, the first file always has the date appended twice.
For example, instead of log.2009-02-23.log, I get log.2009-02-23.log.2009-02-23.log.
I found it so weird and fyi, this is a very simple code. It's not like I have it running in a multi-threaded environment.
My log4net config:
<log4net>
<appender name="MyLog" type="log4net.Appender.RollingFileAppender">
<file value="../../Logs/Mylog"/>
<staticLogFileName value="false" />
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<datePattern value=".yyyy-MM-dd.lo\g" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{DATE} [%t] %-5p %c - %m%n"/>
</layout>
</appender>
<root>
<level value="INFO"/>
<appender-ref ref="MyLog"/>
</root>
</log4net>
Any ideas why?
Edit: I want to add the information about the environment I'm testing this in.
- asp.net
- .net framework 2.0
- windows server 2003 64-bit service pack 2
- log4net 1.2.10
This happens if there is a problem accessing the log file when you initialize the log system.
It can happen if you initialize the log system twice, if you run your program while another copy is running and writing to the log file, or if you are editing the log file in a text editor. Basically anything that causes a write lock on the log file when log4net init runs.
Check your code for duplicate calls to log4net init - perhaps you are initializing in a constructor instead of in a singleton's static constructor or global init, for example.
This can also happen if you are running in a 'web garden' configuration and don't include the PID in the filename, because each different web server process tries to write to the same file. If using web gardens and writing to files, add the pid to the filename pattern so each server process gets its own file.
It's a permission problem. At least that's what's happening to me.
I'm new in using Log4Net so I didn't know that it has internal logging but I found it so I tried turning internal logging on.
I wasn't very sure what it's saying but here's what it looks like to me it's doing:
1. Append the date to the file name.
2. Try to access the file to write to it (failed).
3. Append the date to the file name again.
4. Successfully access the file (which has the weird file name now)
Before I know this, I was google-ing for the solution to this problem with keywords like what I have as a title on this stackoverflow question. There wasn't that much information out there. I found maybe one guy who said it happens to some people but never really explained why nor the solution. With this new information (+the internal error message from Log4Net), I was looking at different threads from the search engines. With that I found hints that it might be a permission problem.
It seems that the writing application doesn't have sufficient permission to the logs folder. The default identity of the application is usually NETWORK_SERVICE. After I give more permission (I gave it full control but i don't know what is the minimum to make it work) to the folder, it works just fine.
If anyone can explain this better than me, please feel free to edit.
I run into the same problem. For me, it was a combination of using RollingFileAppender for my test logs, and running my NUnit tests with ReSharper.
It turns out that ReSharper uses two processes to run the tests:
which creates a race condition on the log file.
Now, if we change the log file name to include the process id:
<appender name="MyLog" type="log4net.Appender.RollingFileAppender">
<file type="log4net.Util.PatternString" value="MyLog.pid.%processid" />
<appendToFile value="true" />
<rollingStyle value="Composite" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="false"/>
<datePattern value="_yyyy-MM-dd'.log'"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{HH:mm:ss.fff} [%15.15t] %-5p '%40.40c' - %m%n" />
</layout>
</appender>
the problem is solved. Each file gets its own, unique name:
MyLog.pid.5440_2010-10-13.log
MyLog.pid.1496_2010-10-13.log
Note the use of PatternString for 'type'.
Hope that helps.
As olle pointed out. your problem is related to the '\g', which your log4net is interpreting as another dateformat.
Try deleting the ".yyyy-MM-dd.lo\g" and replacing it with "yyyy-MM-dd"
The ".log" doesn't belong in the dateformat
I use the following:
<param name="DatePattern" value="yyyy.MM.dd.\l\o\g"/>
With this I get filenames like: 2009.02.23.log
try <datePattern value=".yyyy-MM-dd.lo\g" /> I don't understand what the \g is for.