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Dll files opened by multiple processes during dotnet test

See original GitHub issue

When I run dotnet test /p:CollectCoverage=true

I get the following exceptions that some dll files built by the project are opened by multiple processes:

C:\Users\CAGK\Desktop\datahub>dotnet test /p:CollectCoverage=true
Test run for C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.Tests.dll(.NETCoreApp,Version=v3.1)
Microsoft (R) Test Execution Command Line Tool Version 16.3.0
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...

A total of 1 test files matched the specified pattern.

Test Run Successful.
Total tests: 20
     Passed: 20
 Total time: 15,5588 Seconds

Calculating coverage result...
C:\Users\CAGK\.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : One or more errors occurred. (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) [C:\Users\CAGK\Desktop\datahub\Datahub.Tests\Datahub.Tests.csproj]
C:\Users\CAGK\.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error :    at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 59 [C:\Users\CAGK\Desktop\datahub\Datahub.Tests\Datahub.Tests.csproj]
C:\Users\CAGK\.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error :    at Coverlet.Core.Helpers.RetryHelper.Retry(Action action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 28 [C:\Users\CAGK\Desktop\datahub\Datahub.Tests\Datahub.Tests.csproj]
C:\Users\CAGK\.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error :    at Coverlet.Core.Helpers.InstrumentationHelper.RestoreOriginalModule(String module, String identifier) in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 218 [C:\Users\CAGK\Desktop\datahub\Datahub.Tests\Datahub.Tests.csproj]
C:\Users\CAGK\.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error :    at Coverlet.Core.Coverage.GetCoverageResult() in D:\git\coverletToRelease\src\coverlet.core\Coverage.cs:line 219 [C:\Users\CAGK\Desktop\datahub\Datahub.Tests\Datahub.Tests.csproj]
C:\Users\CAGK\.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error :    at Coverlet.MSbuild.Tasks.CoverageResultTask.Execute() in D:\git\coverletToRelease\src\coverlet.msbuild.tasks\CoverageResultTask.cs:line 109 [C:\Users\CAGK\Desktop\datahub\Datahub.Tests\Datahub.Tests.csproj]

C:\Users\CAGK\Desktop\datahub>Unhandled exception. System.AggregateException: One or more errors occurred. (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.) (The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.)
 ---> System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52
   --- End of inner exception stack trace ---
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 59
   at Coverlet.Core.Helpers.RetryHelper.Retry(Action action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 28
   at Coverlet.Core.Helpers.InstrumentationHelper.RestoreOriginalModules() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 239
   at Coverlet.Core.Helpers.InstrumentationHelper.<.ctor>b__3_0(Object s, EventArgs e) in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 24
   at System.AppContext.OnProcessExit()
 ---> (Inner Exception #1) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #2) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #3) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #4) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #5) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #6) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #7) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #8) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---

 ---> (Inner Exception #9) System.IO.IOException: The process cannot access the file 'C:\Users\CAGK\Desktop\datahub\Datahub.Tests\bin\Debug\netcoreapp3.1\Datahub.dll' because it is being used by another process.
   at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in D:\git\coverletToRelease\src\coverlet.core\Helpers\FileSystem.cs:line 33
   at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass10_0.<RestoreOriginalModules>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\InstrumentationHelper.cs:line 242
   at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 26
   at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in D:\git\coverletToRelease\src\coverlet.core\Helpers\RetryHelper.cs:line 52<---


C:\Users\CAGK\Desktop\datahub>

This is my dotnet --info:

C:\Users\CAGK\Desktop\datahub>dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.1.100
 Commit:    cd82f021f4

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.18363
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\3.1.100\

Host (useful for support):
  Version: 3.1.0
  Commit:  65f04fb6db

.NET Core SDKs installed:
  3.1.100 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

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

C:\Users\CAGK\Desktop\datahub>

If I remove the coverage option then the command runs fine. I do not understand why this has started happening.

Issue Analytics

  • State:closed
  • Created 4 years ago
  • Reactions:1
  • Comments:37

github_iconTop GitHub Comments

1reaction
MarcoRossignolicommented, May 21, 2020

--no-build is not an issue…the error I see is the rollback of instrumentation, when tests end coverlet get a file with hits(from tmp) and calculate coverage, after that rollback dll to old ones(moved before IL instrumentation to another tmp folder so we can run more than one instrumentation and also we maintain dll in a original state), and seem that someone is locking files in your bin/Debug folder. I don’t think it’s related to coverlet if it fails also with single project(tests was to understand if that dll was loaded more than one time in different tests, out of coverlet control but maybe could be the culprit), you could try to understand who is blocking that files(antivirus?), you can start with this guide https://support.qlik.com/articles/000005295 I cannot repro in my local, in past we had some issue with hits file but was related to our bug with VSTest integration fixed on master(we’ll release asap) https://github.com/coverlet-coverage/coverlet/pull/835 but no with dll.

1reaction
Cheesebaroncommented, May 12, 2020

It seems to work. Tried a couple of runs with coverlet.collector version 1.3.0-preview.17.g3c55332cce and Microsoft.NET.Test.Sdk 16.6.1

Read more comments on GitHub >

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