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https://issues.apache.org/jira/browse/LOG4NET-510?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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StevenXi updated LOG4NET-510:
-----------------------------
Attachment: screenshot-1.png
> FileAppender.InterProcessLock.AcquireLock blocks everything
> -----------------------------------------------------------
>
> Key: LOG4NET-510
> URL: https://issues.apache.org/jira/browse/LOG4NET-510
> Project: Log4net
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 1.2.13
> Environment: Windows 2012
> Reporter: StevenXi
> Priority: Critical
> Attachments: screenshot-1.png
>
>
> There's a chance InterProcessLock.AcquireLock hangs, and lots of
> Appender.AppenderSkeleton.DoAppend threads queued.
> It happens to our service every 2 days, all happen after mid-night. So after
> a new log file created, few new line in the file added. But not always
> happens.
> As there're hundreds of Appender.AppenderSkeleton.DoAppend threads queued, it
> blocks everywhere in the service that uses log4net.
> log4net is supposed to be 'failure-free' or at least fails quietly, not block
> the whole application.
> config uses
> <lockingModel type="log4net.Appender.FileAppender+InterProcessLock" />
> Debug threads window looks like below: (there're more, but not pasted all
> here)
> Not Flagged 1784 22 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged > 2904 14 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.FileAppender.InterProcessLock.AcquireLock Normal
> Not Flagged 2164 7 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 848 9 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1524 27 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1676 28 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2908 32 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2496 36 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2776 39 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 3036 33 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1200 13 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 684 43 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2804 45 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2156 47 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 864 41 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2224 50 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 3044 53 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2000 56 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2536 58 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1448 61 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1828 55 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1604 64 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 252 66 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2896 71 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2428 73 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2888 76 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 632 69 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 3048 34 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2732 25 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1992 5 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2232 72 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2100 65 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 532 67 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 1596 60 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 260 51 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2720 46 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2444 49 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> Not Flagged 2040 19 Worker Thread Worker Thread
> log4net.dll!log4net.Appender.AppenderSkeleton.DoAppend Normal
> ...
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