StevenXi created LOG4NET-510:
--------------------------------
Summary: 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
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
...
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
