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https://issues.apache.org/jira/browse/LOG4NET-443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14178323#comment-14178323
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Dominik Psenner commented on LOG4NET-443:
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This could be indeed an orphaned lock issue if thread aborts happen regularily.
Is your Win2008 server running on x64 or x32?
> Logger.CallAppenders
> --------------------
>
> Key: LOG4NET-443
> URL: https://issues.apache.org/jira/browse/LOG4NET-443
> Project: Log4net
> Issue Type: Bug
> Affects Versions: 1.2.13
> Environment: Windows service implemented with .NET 4.5 using Log4Net
> 1.2.13 on Windows 2008 R2
> Reporter: Calin Pavel
> Priority: Critical
> Attachments: log4net.xml
>
>
> I do have an .NET application (Windows Service) that collects data from a lot
> of sources (DBs, log files, machines event logs, ...) and uses Log4Net to log
> details of the actions / execution. As expected, I'm using a high number of
> threads to collect data, threads that are writing logs in some files
> (RollingFileAppenderer).
> Lately it happens that the entire application is BLOCKED because all threads
> were trying to acquire a read lock, like in the stack trace:
> 000000001ac3d998 00000000774715fa [HelperMethodFrame: 000000001ac3d998]
> System.Threading.Thread.SleepInternal(Int32)
> 000000001ac3da90 000007fef747b5e9 System.Threading.Thread.Sleep(Int32)
> 000000001ac3dac0 000007fef5fb9631
> System.Threading.ReaderWriterLockSlim.EnterMyLockSpin()
> 000000001ac3db90 000007fef5cd297e
> System.Threading.ReaderWriterLockSlim.TryEnterReadLockCore(TimeoutTracker)
> 000000001ac3dbf0 000007fef5cd28fa
> System.Threading.ReaderWriterLockSlim.TryEnterReadLock(TimeoutTracker)
> 000000001ac3dc40 000007fe98fb4efd
> log4net.Repository.Hierarchy.Logger.CallAppenders(log4net.Core.LoggingEvent)
> 000000001ac3dcc0 000007fe98fb4907
> log4net.Repository.Hierarchy.Logger.Log(System.Type, log4net.Core.Level,
> System.Object, System.Exception)
> 000000001ac3dd30 000007fe98fb47f9 log4net.Core.LogImpl.Info(System.Object)
> It's important to mention that my threads have a timeout, and if they do not
> finish the job in the given interval they are ABORTED.
> Searching for a solution, I found a possible explanation of application
> hanging here:
> http://chabster.blogspot.ro/2013/07/a-story-of-orphaned-readerwriterlockslim.html
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