Reset default runspace - fixes #3860

functions/Get-DbaWindowsLog.ps1

@@ -280,6 +280,7 @@ function Get-DbaWindowsLog {
         #region Setup Runspace
         [Collections.Arraylist]$RunspaceCollection = @()
         $InitialSessionState = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault()
+        $defaultrunspace = [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace
         $RunspacePool = [RunspaceFactory]::CreateRunspacePool($InitialSessionState)
         $RunspacePool.SetMinRunspaces(1) | Out-Null
         if ($MaxThreads -gt 0) { $null = $RunspacePool.SetMaxRunspaces($MaxThreads) }
@@ -303,6 +304,6 @@ function Get-DbaWindowsLog {
         Receive-Runspace -Wait
         $RunspacePool.Close()
         $RunspacePool.Dispose()
+        [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace = $defaultrunspace
     }
-}
-
+}

functions/Read-DbaBackupHeader.ps1

@@ -190,6 +190,7 @@ function Read-DbaBackupHeader {
 
         #Setup initial session state
         $InitialSessionState = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault()
+        $defaultrunspace = [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace
         #Create Runspace pool, min - 1, max - 10 sessions: there is internal SQL Server queue for the restore operations. 10 threads seem to perform best
         $runspacePool = [runspacefactory]::CreateRunspacePool(1, 10, $InitialSessionState, $Host)
         $runspacePool.Open()
@@ -277,6 +278,7 @@ function Read-DbaBackupHeader {
         }
         #Close the runspace pool
         $runspacePool.Close()
+        [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace = $defaultrunspace
     }
 }
 

internal/functions/Invoke-DbaAsync.ps1

@@ -174,8 +174,9 @@ function Invoke-DbaAsync {
 
             $ds = New-Object system.Data.DataSet
             $da = New-Object system.Data.SqlClient.SqlDataAdapter($cmd)
-
+            
             if ($MessagesToOutput) {
+                $defaultrunspace = [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace
                 $pool = [RunspaceFactory]::CreateRunspacePool(1, [int]$env:NUMBER_OF_PROCESSORS + 1)
                 $pool.ApartmentState = "MTA"
                 $pool.Open()
@@ -227,6 +228,7 @@ function Invoke-DbaAsync {
                 }
                 $pool.Close()
                 $pool.Dispose()
+                [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace = $defaultrunspace
             } else {
                 #Following EventHandler is used for PRINT and RAISERROR T-SQL statements. Executed when -Verbose parameter specified by caller and no -MessageToOutput
                 if ($PSBoundParameters.Verbose) {

internal/functions/Invoke-Parallel.ps1

@@ -180,6 +180,8 @@ function Invoke-Parallel {
         [switch] $Quiet = $false
     )
     begin {
+        # save default runspace
+        $defaultrunspace = [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace
         #No max queue specified?  Estimate one.
         #We use the script scope to resolve an odd PowerShell 2 issue where MaxQueue isn't seen later in the function
         if ( -not $PSBoundParameters.ContainsKey('MaxQueue') ) {
@@ -548,7 +550,6 @@ function Invoke-Parallel {
             #collect garbage
             [gc]::Collect()
         }
+        [System.Management.Automation.Runspaces.Runspace]::DefaultRunspace = $defaultrunspace
     }
-}
-
-
+}