When running multiple different or parallel jobs in Jenkins that involve the SonarQube Scanner for MSBuild, this exception immediately terminates the build job:
10:46:22 [workspace] $ C:\Tools\SonarQube\sonar-scanner-msbuild-3.0.2.656
\MSBuild.SonarQube.Runner.exe begin /k:auth-services /n:auth-services /v:develop-b82 /d:sonar.host.url=http://redacted:9000 /d:sonar.cs.vscoveragexml.reportsPaths=C:\Jenkins\auth-services\auth-services-develop\workspace\VisualStudio.coveragexml /d:sonar.exclusions=node_modules/**,**/*.js
10:46:23 SonarQube Scanner for MSBuild 3.0.2
10:46:23 Default properties file was found at C:\Tools\SonarQube\sonar-scanner-msbuild-3.0.2.656\SonarQube.Analysis.xml
10:46:23 Loading analysis properties from C:\Tools\SonarQube\sonar-scanner-msbuild-3.0.2.656\SonarQube.Analysis.xml
10:46:23 Pre-processing started.
10:46:23 Preparing working directories...
10:46:23 10:46:23.814 Updating build integration targets...
10:46:23
10:46:23 Unhandled Exception: System.IO.IOException: The file 'C:\Users\serviceaccount\AppData\Local\Microsoft\MSBuild\15.0\Microsoft.Common.targets\ImportBefore\SonarQube.Integration.ImportBefore.targets' already exists.
10:46:23 at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
10:46:23 at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost)
10:46:23 at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
10:46:23 at SonarQube.TeamBuild.PreProcessor.TargetsInstaller.CopyIfDifferent(String sourcePath, IEnumerable`1 destinationDirs, ILogger logger)
10:46:23 at SonarQube.TeamBuild.PreProcessor.TargetsInstaller.InternalCopyTargetsFile(ILogger logger)
10:46:23 at SonarQube.TeamBuild.PreProcessor.TargetsInstaller.InstallLoaderTargets(ILogger logger, String workDirectory)
10:46:23 at SonarQube.TeamBuild.PreProcessor.TeamBuildPreProcessor.InstallLoaderTargets(ProcessedArgs args)
10:46:23 at SonarQube.TeamBuild.PreProcessor.TeamBuildPreProcessor.DoExecute(ProcessedArgs localSettings)
10:46:23 at SonarQube.TeamBuild.PreProcessor.TeamBuildPreProcessor.Execute(String[] args)
10:46:23 at SonarQube.Bootstrapper.BootstrapperClass.PreProcess()
10:46:23 at SonarQube.Bootstrapper.BootstrapperClass.Execute()
10:46:23 at SonarQube.Bootstrapper.Program.Execute(String[] args, ILogger logger)
10:46:23 at SonarQube.Bootstrapper.Program.Main(String[] args)
10:46:23 at SonarQube.Old.Bootstrapper.Program.Main(String[] args)
10:46:26 ERROR: Execution of SonarQube Scanner for MSBuild failed (exit code 255)
Restarting the build job while no other jobs involving the scanner are running seems to successfully finish building.