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https://issues.apache.org/jira/browse/LOG4NET-381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13676742#comment-13676742
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Dominik Psenner commented on LOG4NET-381:
-----------------------------------------
This seems to happen while log4net is starting up. Have you turned on internal
logging to see what's going on?
> IIS worker process hangs while writing to logs
> ----------------------------------------------
>
> Key: LOG4NET-381
> URL: https://issues.apache.org/jira/browse/LOG4NET-381
> Project: Log4net
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 1.2.9
> Environment: Windows 2008 R2, IIS 7
> Reporter: Indra Bhanu
> Priority: Critical
>
> Observed multiple application pools for website and upon analyzing w3wp
> process dumps of hang worker processors, we found the hang was due to log4net
> process and below is your detailed observations.
> active requests in all the dumps are saying log4net logging
>
> . 0 Id: 478.2c0c Suspend: -1 Teb: 000007ff`fffaa000 Unfrozen
> Child-SP RetAddr Call Site
> 00000000`01f5cd08 000007fe`fd0881cd ntdll!ZwQueryFullAttributesFile+0xa
> 00000000`01f5cd10 000007fe`f91ae377 KERNELBASE!GetFileAttributesExW+0x9d
> 00000000`01f5cde0 000007fe`f7d3d038
> mscorwks!DoNDirectCall__PatchGetThreadCall+0x7b
> 00000000`01f5ce80 000007fe`f7d3cd1c
> mscorlib_ni!DomainNeutralILStubClass.IL_STUB(System.String, Int32,
> WIN32_FILE_ATTRIBUTE_DATA ByRef)+0x138
> 00000000`01f5d000 000007fe`f7cc6318
> mscorlib_ni!System.IO.File.FillAttributeInfo(System.String,
> WIN32_FILE_ATTRIBUTE_DATA ByRef, Boolean, Boolean)+0x27c
> 00000000`01f5d130 000007fe`f7cc9d04
> mscorlib_ni!System.IO.File.InternalExists(System.String)+0x48
> 00000000`01f5d190 000007ff`002c33cc
> mscorlib_ni!System.IO.File.Exists(System.String)+0xf4
> 00000000`01f5d210 000007ff`002c31f6
> log4net!log4net.Appender.RollingFileAppender.OpenFile(System.String,
> Boolean)+0x7c
> 00000000`01f5d290 000007ff`002c30d8
> log4net!log4net.Appender.FileAppender.SafeOpenFile(System.String,
> Boolean)+0x36
> 00000000`01f5d300 000007ff`002c1b4c
> log4net!log4net.Appender.FileAppender.ActivateOptions()+0x148
> 00000000`01f5d370 000007ff`002b946b
> log4net!log4net.Appender.RollingFileAppender.ActivateOptions()+0x29c
> 00000000`01f5d400 000007ff`002b8ec2
> log4net!log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(System.Xml.XmlElement)+0x4cb
> 00000000`01f5d4c0 000007ff`002b92df
> log4net!log4net.Repository.Hierarchy.XmlHierarchyConfigurator.FindAppenderByReference(System.Xml.XmlElement)+0x212
> 00000000`01f5d540 000007ff`002b8ec2
> log4net!log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(System.Xml.XmlElement)+0x33f
> 00000000`01f5d600 000007ff`002b8345
> log4net!log4net.Repository.Hierarchy.XmlHierarchyConfigurator.FindAppenderByReference(System.Xml.XmlElement)+0x212
> 00000000`01f5d680 000007ff`002c548b
> log4net!log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseChildrenOfLoggerElement(System.Xml.XmlElement,
> log4net.Repository.Hierarchy.Logger, Boolean)+0x125
> 00000000`01f5d710 000007ff`002b7d78
> log4net!log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseLogger(System.Xml.XmlElement)+0x18b
> 00000000`01f5d790 000007ff`002b78f5
> log4net!log4net.Repository.Hierarchy.XmlHierarchyConfigurator.Configure(System.Xml.XmlElement)+0x3b8
> 00000000`01f5d820 000007ff`002b785a
> log4net!log4net.Repository.Hierarchy.Hierarchy.XmlRepositoryConfigure(System.Xml.XmlElement)+0x35
> 00000000`01f5d860 000007ff`002b7668
> log4net!log4net.Config.XmlConfigurator.ConfigureFromXml(log4net.Repository.ILoggerRepository,
> System.Xml.XmlElement)+0x16a
> 00000000`01f5d8b0 000007ff`002b72ff
> log4net!log4net.Config.XmlConfigurator.Configure(log4net.Repository.ILoggerRepository,
> System.IO.Stream)+0x1f8
> 00000000`01f5d920 000007ff`002b708c
> log4net!log4net.Config.XmlConfigurator.Configure(log4net.Repository.ILoggerRepository,
> System.IO.FileInfo)+0x19f
> 00000000`01f5d9a0 000007ff`002b6c31
> log4net!log4net.Config.XmlConfigurator.ConfigureAndWatch(log4net.Repository.ILoggerRepository,
> System.IO.FileInfo)+0xfc
> 00000000`01f5da00 000007ff`002b5fb5
> Core!Ent.Logging.LogManager.ConfigureAndWatch(System.IO.FileInfo)+0x31
> 00000000`01f5da60 000007fe`f91aeb52
> App_global_asax!ASP.global_asax.Application_Start(System.Object,
> System.EventArgs)+0xb55
> managed callstack says below
>
> 0:000> !clrstack
> OS Thread Id: 0x2c0c (0)
> Child-SP RetAddr Call Site
> 0000000001f5ce80 000007fef7d3cd1c
> DomainNeutralILStubClass.IL_STUB(System.String, Int32,
> WIN32_FILE_ATTRIBUTE_DATA ByRef)
> 0000000001f5d000 000007fef7cc6318
> System.IO.File.FillAttributeInfo(System.String, WIN32_FILE_ATTRIBUTE_DATA
> ByRef, Boolean, Boolean)
> 0000000001f5d130 000007fef7cc9d04 System.IO.File.InternalExists(System.String)
> 0000000001f5d190 000007ff002c33cc System.IO.File.Exists(System.String)
> 0000000001f5d210 000007ff002c31f6
> log4net.Appender.RollingFileAppender.OpenFile(System.String, Boolean)
> 0000000001f5d290 000007ff002c30d8
> log4net.Appender.FileAppender.SafeOpenFile(System.String, Boolean)
> 0000000001f5d300 000007ff002c1b4c
> log4net.Appender.FileAppender.ActivateOptions()
> 0000000001f5d370 000007ff002b946b
> log4net.Appender.RollingFileAppender.ActivateOptions()
> 0000000001f5d400 000007ff002b8ec2
> log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(System.Xml.XmlElement)
> 0000000001f5d4c0 000007ff002b92df
> log4net.Repository.Hierarchy.XmlHierarchyConfigurator.FindAppenderByReference(System.Xml.XmlElement)
> 0000000001f5d540 000007ff002b8ec2
> log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseAppender(System.Xml.XmlElement)
> 0000000001f5d600 000007ff002b8345
> log4net.Repository.Hierarchy.XmlHierarchyConfigurator.FindAppenderByReference(System.Xml.XmlElement)
> 0000000001f5d680 000007ff002c548b
> log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseChildrenOfLoggerElement(System.Xml.XmlElement,
> log4net.Repository.Hierarchy.Logger, Boolean)
> 0000000001f5d710 000007ff002b7d78
> log4net.Repository.Hierarchy.XmlHierarchyConfigurator.ParseLogger(System.Xml.XmlElement)
> 0000000001f5d790 000007ff002b78f5
> log4net.Repository.Hierarchy.XmlHierarchyConfigurator.Configure(System.Xml.XmlElement)
> 0000000001f5d820 000007ff002b785a
> log4net.Repository.Hierarchy.Hierarchy.XmlRepositoryConfigure(System.Xml.XmlElement)
> 0000000001f5d860 000007ff002b7668
> log4net.Config.XmlConfigurator.ConfigureFromXml(log4net.Repository.ILoggerRepository,
> System.Xml.XmlElement)
> 0000000001f5d8b0 000007ff002b72ff
> log4net.Config.XmlConfigurator.Configure(log4net.Repository.ILoggerRepository,
> System.IO.Stream)
> 0000000001f5d920 000007ff002b708c
> log4net.Config.XmlConfigurator.Configure(log4net.Repository.ILoggerRepository,
> System.IO.FileInfo)
> 0000000001f5d9a0 000007ff002b6c31
> log4net.Config.XmlConfigurator.ConfigureAndWatch(log4net.Repository.ILoggerRepository,
> System.IO.FileInfo)
> 0000000001f5da00 000007ff002b5fb5
> Ent.Logging.LogManager.ConfigureAndWatch(System.IO.FileInfo)
> 0000000001f5da60 000007fef91aeb52
> ASP.global_asax.Application_Start(System.Object, System.EventArgs)
> 0000000001f5e3a0 000007fef7d3afa6
> System.Reflection.RuntimeMethodInfo.Invoke(System.Object,
> System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[],
> System.Globalization.CultureInfo, Boolean)
> 0000000001f5e540 000007fef16d55b3
> System.Reflection.RuntimeMethodInfo.Invoke(System.Object,
> System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[],
> System.Globalization.CultureInfo)
> 0000000001f5e590 000007fef16e432d
> System.Web.HttpApplication.ProcessSpecialRequest(System.Web.HttpContext,
> System.Reflection.MethodInfo, Int32, System.Object, System.EventArgs,
> System.Web.SessionState.HttpSessionState)
> 0000000001f5e640 000007fef16d4a5d
> System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(System.Web.HttpContext,
> System.Web.HttpApplication)
> 0000000001f5e6f0 000007fef16d5230
> System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr,
> System.Web.HttpContext, System.Reflection.MethodInfo[])
> 0000000001f5e7a0 000007fef16e47ce
> System.Web.HttpApplication.InitSpecial(System.Web.HttpApplicationState,
> System.Reflection.MethodInfo[], IntPtr, System.Web.HttpContext)
> 0000000001f5e860 000007fef17dd51e
> System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr,
> System.Web.HttpContext)
> 0000000001f5e900 000007fef91aeb52
> System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr)
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