We're using Log4Net with a FileAppender to log errors during a process. As the process is finishing, we want to email the log file but we can't do that as it Log4Net still has a lock on the file and we get a message that the file is in use by another process. Any ideas?
We're using a config like this:
<appender name="WarnFileAppender" type="log4net.Appender.FileAppender">
<file value="d:\for-review-log.txt" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date %logger - %message%newline" />
</layout>
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="INFO" />
<levelMax value="WARN" />
</filter>
<filter type="log4net.Filter.DenyAllFilter" />
<appendToFile value="false"></appendToFile>
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
</appender>
I assume log is from some kind of service, so the log will be locked until service is running.
You probably want to use shared lock while reading the file for sending.
Or you can copy the file and send the copy.
ive got the same problem. Olso a flush doesn't work and when i try to use the SMTPmailAppender that olso doesn't seem to work somehow. but when i use my own created class to send email it works, only he doesn't add the attachment(logfile)
Related
I have .net 4.5.2 applications where i am using log4net 1.2.15.0 version (even in 2.0.8)
I have random behavior that in method name i am getting ? in my text file
I have tried both %M or %method and this behavior reoccur randomly
My Appender setting is
<appender name="MyApp" type="log4net.Appender.RollingFileAppender" >
<file value="..\\Logs\\MyApp.txt" />
<appendToFile value="true" />
<datePattern value="yyyyMMdd" />
<rollingStyle value="Date" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="1MB" />
<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
<filter type="log4net.Filter.LevelRangeFilter">
<acceptOnMatch value="true" />
<levelMin value="INFO" />
<levelMax value="FATAL" />
</filter>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%d{yyyy-MM-dd HH:mm:ss.fff} %10p [%2t] %5c{1}.%method - %m%n" />
<!-- <conversionPattern value="%d{yyyy-MM-dd HH:mm:ss.fff} %10p [%2t] %5c{1}.%M - %m%n" /> -->
</layout>
</appender>
Sample output text in log file is
2017-08-22 07:13:08.668 INFO [ 4] ServicesManager.? - Socket connectivity Reply from aaa, is True at socket connectivity attempt 1
Please help me in finding what's the problem
This is documented behaviour:
The following patterns %type %file %line %method %location %class %C %F %L %l %M all generate caller location information. Location information uses the System.Diagnostics.StackTrace class to generate a call stack. The caller's information is then extracted from this stack.
StackTrace information will be most informative with Debug build configurations. By default, Debug builds include debug symbols, while Release builds do not. The debug symbols contain most of the file, method name, line number, and column information used in constructing StackFrame and StackTrace objects. StackTrace might not report as many method calls as expected, due to code transformations that occur during optimization.
This means that in a Release build the caller information may be incomplete or may not exist at all! Therefore caller location information cannot be relied upon in a Release build.
The documentation also says:
Generating caller location information is extremely slow. Its use should be avoided unless execution speed is not an issue.
I have configured log4net with a RollingLogFileAppender and a SmtpAppender, with the intention of logging the DEBUG level to the RollingLogFileAppender and FATAL only to the SmtpAppender:
<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
<to value="test#test.com" />
<from value="test#test.com" />
<subject value="Fatal Error" />
<smtpHost value="smtp.test.com" />
<SMTPPort value="366"/>
<Username value="test#test.com"/>
<Password value="password"/>
<bufferSize value="1" />
<lossy value="true" />
<evaluator type="log4net.Core.LevelEvaluator">
<threshold value="FATAL"/>
</evaluator>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%ndc] - %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="RollingLogFileAppender" />
<appender-ref ref="SmtpAppender" />
</root>
This works perfectly until I increase the bufferSize. When I do this, all levels are sent via email and the log4net.Core.LevelEvaluator seems to be ignored. I have also tried using LevelRangeFilter and LevelMatchFilter but with these configured I seem to get no emails at all.
The evaluator is not ignored, but it does not do what you expect: Your settings instruct the appender to put all log messages on a buffer and send an email only when a message with level FATAL is logged. If the buffer is full then the oldest messages are discarded (that is the lossy setting; without it you would also get an email as soon as the buffer is full).
If you want to filter the messages then you need to use a filter. For instance like this:
<filter type="log4net.Filter.LevelMatchFilter">
<acceptOnMatch value="true" />
<levelToMatch value="FATAL" />
</filter>
<filter type="log4net.Filter.DenyAllFilter" />
I am not sure though if I would consider my mail appender like this since I would want to get notified immediately if my application has a problem that it needs to log it with level FATAL.
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
The goal is to have our application specific event logs in a folder with the name of our company. So, Company/App1, Company/App2. I would prefer to accomplish this with configuration, or with very little code. I tried setting logName to "MyFolder/MyLog" to no avail.
Example of a folder in event viewer, reference the Microsoft folder
This is my current Appender configuration:
<appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
<filter type="log4net.Filter.LevelRangeFilter">
<levelMin value="WARN" />
<levelMax value="FATAL" />
</filter>
<applicationName value="ExampleApp" />
<logName value="MyLog" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
You can set the path directly in the configuration, where you specify the log name, just specify the full path. You must however make sure that whatever user your application is running under has write access to that folder. Permissions are usually the cause for problems like this.
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>