Show-UDModal can error is user swaps focus to another window.

[gerane]

Describe the Issue

This may be related to #1196 but in case it isn't I was going to open a new issue.

I have some users who cause show-udmodal to error. It seems to be related to making a selection that will display a modal, and swapping focus from the browser or to a different tab before it shows up. I am still trying to reproduce it, but I haven't got been able to cause it to happen forced just yet. Here is some of the error output which may be of more help.

ResolvedError



PSMessageDetails      : 
Exception             : System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: 
                        Value cannot be null.
                        Parameter name: connectionId
                           at Microsoft.AspNetCore.SignalR.DefaultHubLifetimeManager`1.SendConnectionAsync(String 
                        connectionId, String methodName, Object[] args, CancellationToken cancellationToken)
                           at Microsoft.AspNetCore.SignalR.Internal.SingleClientProxy`1.SendCoreAsync(String method, 
                        Object[] args, CancellationToken cancellationToken)
                           at Microsoft.AspNetCore.SignalR.ClientProxyExtensions.SendAsync(IClientProxy clientProxy, 
                        String method, Object arg1, CancellationToken cancellationToken)
                           at UniversalDashboard.DashboardHubContextExtensions.<ShowModal>d__0.MoveNext() in 
                        D:\a\1\s\src\UniversalDashboard\Server\DashboardHub.cs:line 25
                           --- End of inner exception stack trace ---
                           at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
                           at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken 
                        cancellationToken)
                           at UniversalDashboard.Cmdlets.ShowModalCommand.EndProcessing() in 
                        D:\a\1\s\src\UniversalDashboard\Cmdlets\ShowModalCommand.cs:line 54
                           at System.Management.Automation.CommandProcessorBase.Complete()
                        ---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
                        Parameter name: connectionId
                           at Microsoft.AspNetCore.SignalR.DefaultHubLifetimeManager`1.SendConnectionAsync(String 
                        connectionId, String methodName, Object[] args, CancellationToken cancellationToken)
                           at Microsoft.AspNetCore.SignalR.Internal.SingleClientProxy`1.SendCoreAsync(String method, 
                        Object[] args, CancellationToken cancellationToken)
                           at Microsoft.AspNetCore.SignalR.ClientProxyExtensions.SendAsync(IClientProxy clientProxy, 
                        String method, Object arg1, CancellationToken cancellationToken)
                           at UniversalDashboard.DashboardHubContextExtensions.<ShowModal>d__0.MoveNext() in 
                        D:\a\1\s\src\UniversalDashboard\Server\DashboardHub.cs:line 25<---
                        
TargetObject          : 
CategoryInfo          : NotSpecified: (:) [Show-UDModal], AggregateException
FullyQualifiedErrorId : System.AggregateException,UniversalDashboard.Cmdlets.ShowModalCommand
ErrorDetails          : 
InvocationInfo        : System.Management.Automation.InvocationInfo
ScriptStackTrace      : at Invoke-Selection<Process>, C:\Program 
                        Files\WindowsPowerShell\Modules\Module\2.0.4\Public\Components\Invoke-Selection.ps1: 
                        line 127
                        at Add-License<Process>, C:\Program Files\WindowsPowerShell\Modules\Dashboard\2.0.4\P
                        ublic\Management\Add-License.ps1: line 40
                        at <ScriptBlock>, <No file>: line 15 PipelineIterationInfo : {}






MyCommand             : Show-UDModal
BoundParameters       : {}
UnboundArguments      : {}
ScriptLineNumber      : 127
OffsetInLine          : 17
HistoryId             : 1
ScriptName            : C:\Program 
                        Files\WindowsPowerShell\Modules\Dashboard\2.0.4\Public\Components\Invoke-Selection.ps1
Line                  :                 Show-UDModal -Header { New-UDHeading -Size 5 -Text $SelectionText} -Persistent 
                        -Content {
                        
PositionMessage       : At C:\Program Files\WindowsPowerShell\Modules\Dashboard\2.0.4\Public\Components\Invoke-Sel
                        ection.ps1:127 char:17
                        + ...             Show-UDModal -Header { New-UDHeading -Size 5 -Text $Selec ...
                        +                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PSScriptRoot          : C:\Program Files\WindowsPowerShell\Modules\Dashboard\2.0.4\Public\Components
PSCommandPath         : C:\Program 
                        Files\WindowsPowerShell\Modules\Dashboard\2.0.4\Public\Components\Invoke-Selection.ps1
InvocationName        : Show-UDModal
PipelineLength        : 0
PipelinePosition      : 0
ExpectingInput        : False
CommandOrigin         : Internal
DisplayScriptPosition : 




00000000000000000000000000000000000000000000000000000000000000000000000000000000


InnerExceptions : {connectionId}
Message         : One or more errors occurred.
Data            : {}
InnerException  : System.ArgumentNullException: Value cannot be null.
                  Parameter name: connectionId
                     at Microsoft.AspNetCore.SignalR.DefaultHubLifetimeManager`1.SendConnectionAsync(String 
                  connectionId, String methodName, Object[] args, CancellationToken cancellationToken)
                     at Microsoft.AspNetCore.SignalR.Internal.SingleClientProxy`1.SendCoreAsync(String method, Object[] 
                  args, CancellationToken cancellationToken)
                     at Microsoft.AspNetCore.SignalR.ClientProxyExtensions.SendAsync(IClientProxy clientProxy, String 
                  method, Object arg1, CancellationToken cancellationToken)
                     at UniversalDashboard.DashboardHubContextExtensions.<ShowModal>d__0.MoveNext() in 
                  D:\a\1\s\src\UniversalDashboard\Server\DashboardHub.cs:line 25
TargetSite      : Void ThrowIfExceptional(Boolean)
StackTrace      :    at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
                     at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
                     at UniversalDashboard.Cmdlets.ShowModalCommand.EndProcessing() in 
                  D:\a\1\s\src\UniversalDashboard\Cmdlets\ShowModalCommand.cs:line 54
                     at System.Management.Automation.CommandProcessorBase.Complete()
HelpLink        : 
Source          : mscorlib
HResult         : -2146233088




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Message        : Value cannot be null.
                 Parameter name: connectionId
ParamName      : connectionId
Data           : {}
InnerException : 
TargetSite     : System.Threading.Tasks.Task SendConnectionAsync(System.String, System.String, System.Object[], 
                 System.Threading.CancellationToken)
StackTrace     :    at Microsoft.AspNetCore.SignalR.DefaultHubLifetimeManager`1.SendConnectionAsync(String 
                 connectionId, String methodName, Object[] args, CancellationToken cancellationToken)
                    at Microsoft.AspNetCore.SignalR.Internal.SingleClientProxy`1.SendCoreAsync(String method, Object[] 
                 args, CancellationToken cancellationToken)
                    at Microsoft.AspNetCore.SignalR.ClientProxyExtensions.SendAsync(IClientProxy clientProxy, String 
                 method, Object arg1, CancellationToken cancellationToken)
                    at UniversalDashboard.DashboardHubContextExtensions.<ShowModal>d__0.MoveNext() in 
                 D:\a\1\s\src\UniversalDashboard\Server\DashboardHub.cs:line 25
HelpLink       : 
Source         : Microsoft.AspNetCore.SignalR.Core
HResult        : -2147467261

To Reproduce

The user said they started a process by clicking selection button and then changed windows. The button opens a selection modal that has a table with select buttons.

Expected behavior

Should not error.

Version Information

• Operating System: Server 2016
• PowerShell Version: 5.1
• Universal Dashboard Version: 2.6.0
• UD Hosting Method: IIS

Additional context

[gerane]

@adamdriscoll this isn't just swapping windows. It seems the dashboard just sometimes has issues showing modals. This same error about a null connectionid can happen with a single browser tab open.

What I am unsure of, is if multiple different users using the dashboard might have something to do with this.

[gerane]

This sounds like it is related to #1171

[adamdriscoll]

We are seeing other weirdness as well: https://forums.universaldashboard.io/t/modals-appearing-on-other-peoples-screens/1465/16

Something is up with modals (maybe just signalr) and IIS

Are you using single-sign on auth?

[adamdriscoll]

@gerane Can you try tonight's nightly build? I think I found the issue... It will be available tomorrow.