I have a web app that uses log4net to log errors to a log file.
It works well when I publish my website via xcopy but when I build a package installer, log4net does not appear to work when remote users access my site.
I use impersonate=true in my web.config and log4net only logs errors when I am the logged user.
I have another app that works fine in all cases but was not package deployed.
Does anyone have any thoughts?
After all it was a permission issue
setting the write permission to everyone log4net started logging well as it uses the
current logged user account
regards
i don't think so because same config is used in a working app
but here it is
what user does log4net uses when writing to disk?!
Is there any need to add permissions to write to log folders? Because i use impersonate=true the user logged to the site is the one that log4net is using to write
to file system right?!
<!-- log4net -->
<log4net debug="false">
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="D:\\WSBank\\Solution\\Logs\\Solution.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1024KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL" />
<appender-ref ref="RollingFileAppender" />
</root>
</log4net>
Related
I have an C# application that can run on Windows 10 either as a console app or as a service, depending on a configuration parameter. I am writing log messages using a log4net RollingFileAppender. I'm using log4net version 4.5. When the application runs as a console app, the rolling file gets written as expected. When it is run as a service the file does not get written. What can I do to get my log file?
Here's the configuration file:
<?xml version="1.0" encoding="utf-8"?>
<log4net>
<appender name="TimedFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="c:/misc/HotspotControlService.log" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd.lo\g" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date - %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="TimedFileAppender" />
</root>
</log4net>
As usual, my own idiocy is the problem. I specified the configuration file in my program by the bare file name, with no folder given. The file exists in the same folder as my executable file. But when running as a service, the working folder is not the folder in which the executable folder lives. I used an absolute path for the configuration file name, and it worked.
I am using log4net – EventLogAppender to log the application errors to a custom log. This happens, but the errors are also logged in Application log. Since I have my own custom event log say myLog, is it possible to stop the errors being logged into default log Application?
<log4net debug="true">
<appender name="sendAlertAppender" type="sendAlertAppender.MultiThresholdNotifyingAppender,sendAlertAppender">
<LevelThreshold value="ERROR"/>
<appender-ref ref="EventLogAppender"/>
</appender>
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
<param name="LogName" value="xxxWebLogs" />
<param name="ApplicationName" value="xxx" />
<eventId value="5" />
<eventCategory value="10" />
<filter type="log4net.Filter.LevelRangeFilter">
<acceptOnMatch value="true" />
<levelMin value="INFO" />
<levelMax value="FATAL" />
</filter>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<root>
<level value="ALL"/>
<priority value="DEBUG" />
<appender-ref ref="sendAlertAppender"/>
<appender-ref ref="EventLogAppender"/>
</root>
</log4net>
I'm still not sure what your issue is, but looking at the configuration I believe you need to change the LogName setting:
<param name="LogName" value="PortalWebLogs" />
If this doesn't work, it could be a permissions issue. See here for more information:
log4Net EventlogAppender does not work for Asp.Net 2.0 WebSite?
I haven't done much with using the event log appender, so i'm not really sure. here's another question talking about it and in the answer, it shows using a logName element with a value attribute instead of a param element. might be worth trying that.
Configuring a custom event log for log4net
So I am trying to set up Log4Net in my Web .NET 4.0 application. I have added the correct .dll to my project and have appended the following to my Web.Config file as starters:
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingLogFileAppender" />
</root>
</configSections>
<log4net debug="true">
<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="C:\\TestProj\\TestLog.txt" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="10MB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%-5p %d %5rms %-22.22c{1} %-18.18M - %m%n" />
</layout>
</appender>
However, if I append the "log4net" section to Web.Config, I will receive the error message
Unable to start debugging on the web server. See help for common
configuration problems.....
Make sure the server is running correctly. Verify there are no syntax
errors in the web.config........
NOTE
I can remove all the internals of this section and leave only the declaration:
<log4net></log4net>
and I will still get the same error.
Can someone give me some pointers on how to track down this error?
For developers who are not sure exactly how to get started following might be a help
ConfigSections in app.config
Remember to tell your application that a library is introducing a custom configuration section are you are intended to utilize, I am not perfectly sure if it is mandatory or not but I always use it as first section within root <configuration> tag.
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
log4net config in app.config
There are quite a variety of different appenders available in log4net but I usually use RollingFileAppender so I am using the same one in this sample, you can find rest of those here.
<log4net>
<!-- file appender -->
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="C:/logs/my_log_file.log"/>
<appendToFile value="true"/>
<rollingStyle value="Date"/>
<maxSizeRollBackups value="30"/>
<datePattern value=".yyyy-MM-dd"/>
<staticLogFileName value="true"/>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>
</layout>
</appender>
<root>
<level value="DEBUG"/>
<appender-ref ref="RollingFileAppender"/>
</root>
</log4net>
Update AssemblyInfo.cs file
I always miss this step whenever I have to create a new project. So remember you have to tell your application to watch for XMLConfigurator to perform configuration of log4net, so following line goes at the end of AssemblyInfo.cs file:
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
Get Started
Remember to include the reference of log4net.dll then use following line of code to initialize logger within a class
private static ILog log = LogManager.GetLogger(typeof(MyClass));
And at the end lets use it like following
log.Info("Hello log4net");
Happy Logging :)
Take a look at a sample configurations at log4net documentation homepage.
Chances are you've misplaced required tags.
I have a Windows C# application which uses log4net for logging. This is how the loggers are configured:
<log4net>
<appender name="DebugFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="Local\logs\ApplnTrace.log" />
<threshold value="INFO" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d [%5p] - (%file:%line) %m%n" />
</layout>
</appender>
<appender name="MSGFileAppender" type="log4net.Appender.RollingFileAppender">
<file value=".\local\logs\MsgTrace.log" />
<threshold value="INFO" />
<appendToFile value="true" />
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d %n%m%n" />
</layout>
</appender>
<logger name="ApplnLogger">
<appender-ref ref="DebugFileAppender" />
</logger>
<logger name="MsgLogger">
<appender-ref ref="MSGFileAppender" />
</logger>
</log4net>
The files are rolled over based on date sometimes and sometimes does not and when files are not rolled over, the logging also stops. Can anybody help me find out why?
log4Net is designed to fail quietly. When things stop working, there's usually a problem (most often, it's a config issue or a filesystem security issue).
You might want to try enabling internal log4net debugging. Park this key in the <appSettings> element of your app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
</configuration>
then start your app. Log4net will spew a bunch of debugging info. It gets written to System.Console and to the System.Diagnostics.Trace system. You can catch the trace messages from an attached debugger or by adding a trace listener in the app.config file. If the trace listener writes to a file, make sure that your process has write access, otherwise you'll see nothing:
<configuration>
...
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add
name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\tmp\log4net.txt"
/>
</listeners>
</trace>
</system.diagnostics>
...
</configuration>
There are a number of different trace listeners you can wire up here, including ones that write to the windows event system.
More here:
http://haacked.com/archive/2006/09/27/Log4Net_Troubleshooting.aspx
http://logging.apache.org/log4net/release/sdk/log4net.Util.LogLog.InternalDebugging.html
Without source, it's hard to tell. Does the application also stop working? If yes, find the fatal flaw in your application.
If not, judging from the log4net JIRA, there's plenty of issues with the RollingFileAppender(see: log4net JIRA) :
"RollingFileAppender stops logging intermittently when it tries to roll over the log file"
"RollingFileAppender with rollingStyle="Date" and maximumFileSize both are not working Simultaneously."
Maybe it's one of those issues that's hurting you.
Trying to get log4net setup for .net 4.0 asp.net mvc2 app. I have bare minimum configuration but nothing is getting logged. Am I missing something?
referencing log4net 1.2.10 released version dll
added in sections
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
added section
<log4net>
<appender name="Console" type="log4net.Appender.ConsoleAppender">
<layout type="log4net.Layout.PatternLayout">
<!-- Pattern to output the caller's file name and line number -->
<conversionPattern value="%5level [%thread] (%file:%line) - %message%newline" />
</layout>
</appender>
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="c:\\example.log" />
<appendToFile value="true" />
<maximumFileSize value="100KB" />
<maxSizeRollBackups value="2" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%level %thread %logger - %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="Console" />
<appender-ref ref="RollingFile" />
</root>
</log4net>
trying to log message with log4net.LogManager.GetLogger("global").Error("test error");
But there is nothing getting logged and no error. Tried lot of config variations like only console, only rollingfile, to file appender only. but nothing works. And yes it's .net 4.0 full project not client profile.
What could be wrong in here?
Did you start log4net?
protected void Application_Start()
{
XmlConfigurator.Configure();
...
}