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From "Dan K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4NET-551) LockRecursionException when using File Appenders
Date Tue, 14 Mar 2017 15:41:41 GMT

    [ https://issues.apache.org/jira/browse/LOG4NET-551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15924434#comment-15924434
] 

Dan K commented on LOG4NET-551:
-------------------------------

Hi Stefan,

I see the voting process is complete and positive news! Do you have a timetable as to when
this release will be cut/available in NuGet?

Thanks,

Danny

> LockRecursionException when using File Appenders
> ------------------------------------------------
>
>                 Key: LOG4NET-551
>                 URL: https://issues.apache.org/jira/browse/LOG4NET-551
>             Project: Log4net
>          Issue Type: Bug
>    Affects Versions: 2.0.7
>            Reporter: Matthew Lefoster
>            Priority: Minor
>             Fix For: 2.0.8
>
>
> I have been getting the following exception on the console:
> {quote}
> log4net:ERROR Exception while logging
> System.Threading.LockRecursionException: Recursive read lock acquisitions not allowed
in this mode.
>    at System.Threading.ReaderWriterLockSlim.TryEnterReadLockCore(TimeoutTracker timeout)
>    at System.Threading.ReaderWriterLockSlim.TryEnterReadLock(TimeoutTracker timeout)
>    at System.Threading.ReaderWriterLockSlim.EnterReadLock()
>    at log4net.Util.ReaderWriterLock.AcquireReaderLock()
>    at log4net.Repository.Hierarchy.Logger.CallAppenders(LoggingEvent loggingEvent)
>    at log4net.Repository.Hierarchy.Logger.ForcedLog(Type callerStackBoundaryDeclaringType,
Level level, Object message, Exception exception)
>    at log4net.Repository.Hierarchy.Logger.Log(Type callerStackBoundaryDeclaringType,
Level level, Object message, Exception exception)
> {quote}
> I have a number of different appenders, but this only happens when I am using `log4net.Appender.FileAppender`.
> Using a debugger, I was able to narrow it down to this line (I replaced curly brackets
with square brackets because otherwise JIRA interprets them as macros):
> {quote}
> Logger.DebugFormat("[1] Executing SQL: [0][2][0]With parameters: [3]",
>                 Environment.NewLine, methodName, sql, new ToStringWrapper(parameters));
> {quote}
> My first thought was that ToStringWrapper() was throwing an exception or generating another
logging call. But If I put breakpoints at the log call and at the first line of ToStringWrapper.ToString,
the exception will show up in the console between those two points.
> Oddly enough, if I "step into" the logging call instead of just "continuing" and letting
the breakpoints handle it, no exception happens.



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