Omnisharp-vscode: System.IO.IOException: kqueue() error at init, error code = '24'

[yufeih]

Issue Description

Throws System.IO.IOException when opening a C# solution on a Mac

Steps to Reproduce

Open https://github.com/dotnet/docfx with vscode on Mac

Expected Behavior

Code compiles

Actual Behavior

System.IO.IOException

Logs

OmniSharp log

Starting OmniSharp server at 5/3/2019, 1:56:32 PM
Target: /Users/yufeih/docfx/docfx.sln

OmniSharp server started with Mono 5.10.1.
Path: /Users/yufeih/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/omnisharp/OmniSharp.exe
PID: 572

    Starting OmniSharp on MacOS 10.14 (x64)
    DotNetPath set to dotnet
    Located 2 MSBuild instance(s)
        1: Mono 15.0 - "/Library/Frameworks/Mono.framework/Versions/5.10.1/lib/mono/msbuild/15.0/bin"
        2: StandAlone 15.0 - "/Users/yufeih/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/omnisharp/.msbuild/Current/Bin"
    Registered MSBuild instance: Mono 15.0 - "/Library/Frameworks/Mono.framework/Versions/5.10.1/lib/mono/msbuild/15.0/bin"
        CscToolPath = /Users/yufeih/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/omnisharp/.msbuild/Current/Bin/Roslyn
        CscToolExe = csc.exe
    Detecting Cake files in '/Users/yufeih/docfx'.
    Could not find any Cake files
    Project system 'OmniSharp.DotNet.DotNetProjectSystem' is disabled in the configuration.
    Detecting projects in '/Users/yufeih/docfx/docfx.sln'.
    Queue project update for '/Users/yufeih/docfx/src/docfx/docfx.csproj'
    Queue project update for '/Users/yufeih/docfx/test/docfx.Test/docfx.Test.csproj'
    Queue project update for '/Users/yufeih/docfx/src/Microsoft.Docs.Template/Microsoft.Docs.Template.csproj'
    Detecting CSX files in '/Users/yufeih/docfx'.
    Could not find any CSX files
    Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpWorkspaceOptionsProvider
    Loading project: /Users/yufeih/docfx/src/docfx/docfx.csproj
    Configuration finished.
    Omnisharp server running using Stdio at location '/Users/yufeih/docfx' on host 542.
    Successfully loaded project file '/Users/yufeih/docfx/src/docfx/docfx.csproj'.
    Adding project '/Users/yufeih/docfx/src/docfx/docfx.csproj'
    Skipping code fix provider 'Microsoft.CodeAnalysis.Analyzers.MetaAnalyzers.CodeFixes.ApplyDiagnosticAnalyzerAttributeFix' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.QualityGuidelines.MarkMembersAsStaticFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.QualityGuidelines.PreferJaggedArraysOverMultidimensionalFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.QualityGuidelines.ReviewVisibleEventHandlersFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.QualityGuidelines.UseLiteralsWhereAppropriateFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.Maintainability.AvoidUninstantiatedInternalClassesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.Maintainability.ReviewUnusedParametersFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.Maintainability.UseNameOfInPlaceOfStringFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.Maintainability.VariableNamesShouldNotMatchFieldNamesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.Documentation.AvoidUsingCrefTagsWithAPrefixFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiReview.AvoidCallingProblematicMethodsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.AsyncMethodNamesShouldEndInAsyncFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.AvoidAsyncVoidFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.AvoidEmptyInterfacesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.CollectionsShouldImplementGenericInterfaceFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.DeclareTypesInNamespacesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.DoNotHideBaseClassMethodsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.DoNotMixBlockingAndAsyncFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.DoNotPassAsyncLambdasAsVoidReturningDelegateTypesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.DoNotStoreAsyncLambdasAsVoidReturningDelegateTypesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.EnumsShouldHavePluralNamesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.EnumsShouldHaveZeroValueFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.EnumStorageShouldBeInt32Fixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.IdentifiersShouldHaveCorrectPrefixFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.IdentifiersShouldHaveCorrectSuffixFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.IdentifiersShouldNotContainUnderscoresFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.IdentifiersShouldNotHaveIncorrectSuffixFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.IdentifiersShouldNotMatchKeywordsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.ImplementIDisposableCorrectlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.MarkAssembliesWithAssemblyVersionFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.MarkAssembliesWithClsCompliantFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.MarkAssembliesWithComVisibleFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.MovePInvokesToNativeMethodsClassFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.NonConstantFieldsShouldNotBeVisibleFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.OverrideEqualsAndOperatorEqualsOnValueTypesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.OverrideEqualsOnOverloadingOperatorEqualsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.OverrideGetHashCodeOnOverridingEqualsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.PropagateCancellationTokensWhenPossibleFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.PropertiesShouldNotBeWriteOnlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.PropertyNamesShouldNotMatchGetMethodsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.TypeNamesShouldNotMatchNamespacesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.UseEventsWhereAppropriateFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.UseGenericEventHandlerInstancesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.UsePreferredTermsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.CodeQuality.Analyzers.ApiDesignGuidelines.UsePropertiesWhereAppropriateFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Tasks.DoNotCreateTasksWithoutPassingATaskSchedulerFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.CallGCSuppressFinalizeCorrectlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.DisposableTypesShouldDeclareFinalizerFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.DisposeMethodsShouldCallBaseClassDisposeFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.DoNotLockOnObjectsWithWeakIdentityFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.DoNotUseEnumerableMethodsOnIndexableCollectionsInsteadUseTheCollectionDirectlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.DoNotUseTimersThatPreventPowerStateChangesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.InitializeStaticFieldsInlineFixer`1[TLanguageKindEnum]' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.InstantiateArgumentExceptionsCorrectlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.NormalizeStringsToUppercaseFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.SpecifyCultureInfoFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.SpecifyIFormatProviderFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.SpecifyStringComparisonFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.TestForEmptyStringsUsingStringLengthFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.TestForNaNCorrectlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.Runtime.UseOrdinalStringComparisonFixerBase' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.InteropServices.MarkBooleanPInvokeArgumentsWithMarshalAsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.InteropServices.SpecifyMarshalingForPInvokeStringArgumentsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.InteropServices.UseManagedEquivalentsOfWin32ApiFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetCore.Analyzers.ImmutableCollections.DoNotCallToImmutableCollectionOnAnImmutableCollectionValueFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.AvoidDuplicateAcceleratorsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.CallBaseClassMethodsOnISerializableTypesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.DoNotMarkServicedComponentsWithWebMethodFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.ImplementISerializableCorrectlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.ImplementSerializationMethodsCorrectlyFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.MarkAllNonSerializableFieldsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.MarkWindowsFormsEntryPointsWithStaThreadFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.ProvideDeserializationMethodsForOptionalFieldsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.SetLocaleForDataTypesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.SpecifyMessageBoxOptionsFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Microsoft.NetFramework.Analyzers.TypesShouldNotExtendCertainBaseTypesFixer' because it's language doesn't match 'C#'.
    Skipping code fix provider 'StyleCop.Analyzers.OrderingRules.ElementOrderCodeFixProvider' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Text.Analyzers.IdentifiersShouldBeSpelledCorrectlyFixer' because it's language doesn't match 'C#'.
    Loading project: /Users/yufeih/docfx/test/docfx.Test/docfx.Test.csproj
    Successfully loaded project file '/Users/yufeih/docfx/test/docfx.Test/docfx.Test.csproj'.
    Adding project '/Users/yufeih/docfx/test/docfx.Test/docfx.Test.csproj'
    Skipping code fix provider 'Microsoft.CodeAnalysis.Analyzers.MetaAnalyzers.CodeFixes.ApplyDiagnosticAnalyzerAttributeFix' because it's language doesn't match 'C#'.
    Skipping code fix provider 'Xunit.Analyzers.FixProviders.MemberFixBase' because it's language doesn't match 'C#'.
    Loading project: /Users/yufeih/docfx/src/Microsoft.Docs.Template/Microsoft.Docs.Template.csproj
    Successfully loaded project file '/Users/yufeih/docfx/src/Microsoft.Docs.Template/Microsoft.Docs.Template.csproj'.
    Adding project '/Users/yufeih/docfx/src/Microsoft.Docs.Template/Microsoft.Docs.Template.csproj'
    Skipping code fix provider 'Microsoft.CodeAnalysis.Analyzers.MetaAnalyzers.CodeFixes.ApplyDiagnosticAnalyzerAttributeFix' because it's language doesn't match 'C#'.
    Update project: docfx
    Update project: docfx.Test
    Exception thrown while calling event sinks

System.IO.IOException: kqueue() error at init, error code = '24'
at System.IO.KqueueMonitor.Start () [0x00046] in :0
at System.IO.KeventWatcher.StartDispatching (System.IO.FileSystemWatcher fsw) [0x00033] in :0
at System.IO.FileSystemWatcher.Start () [0x00000] in :0
at System.IO.FileSystemWatcher.set_EnableRaisingEvents (System.Boolean value) [0x00014] in :0
at (wrapper remoting-invoke-with-check) System.IO.FileSystemWatcher.set_EnableRaisingEvents(bool)
at Microsoft.AspNetCore.Razor.OmniSharpPlugin.MSBuildProjectDocumentChangeDetector.ProjectLoaded (OmniSharp.MSBuild.Notification.ProjectLoadedEventArgs loadedArgs) [0x0026e] in <093cbf5c963a4aedba1c75ce31b806d6>:0
at OmniSharp.MSBuild.ProjectManager.ProcessQueue (System.Threading.CancellationToken cancellationToken) [0x00198] in :0
Update project: Microsoft.Docs.Template

Environment information

VSCode version: 1.33.1
C# Extension: 1.19.0

Mono Information

OmniSharp using global mono :5.10.1

Dotnet Information

.NET Core SDK (reflecting any global.json):
Version: 2.2.104
Commit: 73f036d4ac

Runtime Environment:
OS Name: Mac OS X
OS Version: 10.14
OS Platform: Darwin
RID: osx.10.14-x64
Base Path: /usr/local/share/dotnet/sdk/2.2.104/

Host (useful for support):
Version: 2.2.2
Commit: a4fd7b2c84

.NET Core SDKs installed:
2.1.101 [/usr/local/share/dotnet/sdk]
2.1.300 [/usr/local/share/dotnet/sdk]
2.2.101 [/usr/local/share/dotnet/sdk]
2.2.103 [/usr/local/share/dotnet/sdk]
2.2.104 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.0.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

Visual Studio Code Extensions

|Extension|Author|Version|
|---|---|---|
|cpptools|ms-vscode|0.22.1|
|csharp|ms-vscode|1.19.0|
|markdown-all-in-one|yzhang|2.3.1|
|mustache|dawhite|1.1.1|
|vetur|octref|0.19.4|
|vscode-eslint|dbaeumer|1.8.2|
|vscode-npm-script|eg2|0.3.5|
|vscode-proto3|zxh404|0.2.2|
|vscode-yaml|redhat|0.4.0|
|vscodeintellicode|VisualStudioExptTeam|1.1.5|
|vsliveshare|ms-vsliveshare|1.0.125|;

[filipw]

According to the log, OmniSharp picks your global Mono which is 5.10.1 - however since 1.19.0 version of the extension, Mono 5.18.1 is the minimum required (#3000)

Could you please update to the latest Mono from here https://www.mono-project.com/download/stable/ (there is 5.20.1 already) - and see if it helps?

This looks like the same problem as in #3034

[SzeNowy]

I had the same problem. After installation _Mono 5.18.1 (Visual Studio channel*)_ from the page above, like filipw commented all works.

[yufeih]

Thank you @filipw , this is resolved.