Addint to log4net.GlobalContext.Properties causes UnhandleException filter to
fail.
-----------------------------------------------------------------------------------
Key: LOG4NET-247
URL: https://issues.apache.org/jira/browse/LOG4NET-247
Project: Log4net
Issue Type: Bug
Affects Versions: 1.2.10
Environment: Windows XP, SP2.
Reporter: Rob Woerner
Priority: Blocker
Fix For: v.Next
I have an application that registers for
AppDomain.CurrentDomain.UnhandledException and Application.ThreadException.
The handlers weren't getting triggered when exceptions occurred. I have
narrowed it down to this statement:
log4net.GlobalContext.Properties["RFN"] = "myfile.log";
If I take this statement out, exceptions trigger the global exception
handler(s) as expected. After debugging through the code, I see absolutely
nothing that might cause this problem. The Properties property is never even
looked at again. This behavior is bizarre and really interferes with
debugging. It doesn't seem to occur on all systems.
I have created a default WinForms app that does not except call the statement
above and generate an exception. If anyone has any idea what might cause this,
I'd love to here it. Sample code below. All files not given here are the
default files generated by the compiler.
----------- CrashTest.csproj ----------------------
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="3.5" DefaultTargets="Build"
xmlns="http://schemas.microsoft.com/developer/msbuild/2003";>
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProductVersion>9.0.30729</ProductVersion>
<SchemaVersion>2.0</SchemaVersion>
<ProjectGuid>{0F520198-7D51-400A-A373-821F35462CC4}</ProjectGuid>
<OutputType>WinExe</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>CrashTest</RootNamespace>
<AssemblyName>CrashTest</AssemblyName>
<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU'
">
<DebugType>pdbonly</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<ItemGroup>
<Reference Include="log4net, Version=1.2.10.0, Culture=neutral,
PublicKeyToken=1b44e1d426115821, processorArchitecture=MSIL">
<SpecificVersion>False</SpecificVersion>
<HintPath>.\log4net.dll</HintPath>
</Reference>
<Reference Include="System" />
<Reference Include="System.Core">
<RequiredTargetFramework>3.5</RequiredTargetFramework>
</Reference>
<Reference Include="System.Xml.Linq">
<RequiredTargetFramework>3.5</RequiredTargetFramework>
</Reference>
<Reference Include="System.Data.DataSetExtensions">
<RequiredTargetFramework>3.5</RequiredTargetFramework>
</Reference>
<Reference Include="System.Data" />
<Reference Include="System.Deployment" />
<Reference Include="System.Drawing" />
<Reference Include="System.Windows.Forms" />
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Form1.cs">
<SubType>Form</SubType>
</Compile>
<Compile Include="Form1.Designer.cs">
<DependentUpon>Form1.cs</DependentUpon>
</Compile>
<Compile Include="Program.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<EmbeddedResource Include="Form1.resx">
<DependentUpon>Form1.cs</DependentUpon>
</EmbeddedResource>
<EmbeddedResource Include="Properties\Resources.resx">
<Generator>ResXFileCodeGenerator</Generator>
<LastGenOutput>Resources.Designer.cs</LastGenOutput>
<SubType>Designer</SubType>
</EmbeddedResource>
<Compile Include="Properties\Resources.Designer.cs">
<AutoGen>True</AutoGen>
<DependentUpon>Resources.resx</DependentUpon>
</Compile>
<None Include="Properties\Settings.settings">
<Generator>SettingsSingleFileGenerator</Generator>
<LastGenOutput>Settings.Designer.cs</LastGenOutput>
</None>
<Compile Include="Properties\Settings.Designer.cs">
<AutoGen>True</AutoGen>
<DependentUpon>Settings.settings</DependentUpon>
<DesignTimeSharedInput>True</DesignTimeSharedInput>
</Compile>
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
<!-- To modify your build process, add your task inside one of the targets
below and uncomment it.
Other similar extension points exist, see Microsoft.Common.targets.
<Target Name="BeforeBuild">
</Target>
<Target Name="AfterBuild">
</Target>
-->
</Project>
--------------- Program.cs ---------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace CrashTest
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
AppDomain.CurrentDomain.UnhandledException += new
UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
Application.ThreadException += new
System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
static void CurrentDomain_UnhandledException(object sender,
UnhandledExceptionEventArgs e)
{
MessageBox.Show("Crash One!");
}
static void Application_ThreadException(object sender,
System.Threading.ThreadExceptionEventArgs e)
{
MessageBox.Show("Crash Two!");
}
}
}
----------------- Form1.cs --------------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace CrashTest
{
public partial class Form1 : Form
{
public Form1()
{
log4net.GlobalContext.Properties["RFN"] = "foo";
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
StartCrash();
}
void StartCrash()
{
System.Threading.Thread t = new
System.Threading.Thread(EndCrash);
t.IsBackground = true;
t.Start();
}
void EndCrash()
{
string s = null;
s.Clone();
}
}
}
-------------- Form1.Designer.cs -------------------------------
namespace CrashTest
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be
disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(105,
99);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 35);
this.button1.TabIndex = 0;
this.button1.Text = "Crash!";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new
System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F,
16F);
this.AutoScaleMode =
System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(292, 260);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.Button button1;
}
}
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