TimeZone issues related to Mono?

[chassq]

Just wanted to report I am seeing issues with timezone related code. See:

ERROR

MonoPlatform.ts:70 Uncaught Error: System.TimeZoneNotFoundException: Couldn't read time zone file /usr/share/zoneinfo/Eastern Standard Time ---> System.IO.DirectoryNotFoundException: Could not find a part of the path "/usr/share/zoneinfo/Eastern Standard Time".
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) <0x1f623d8 + 0x00226> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share) <0x1f5a478 + 0x00032> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.IO.File.OpenRead (System.String path) <0x1f5a180 + 0x0000e> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.FindSystemTimeZoneByFileName (System.String id, System.String filepath) <0x1f59ef0 + 0x00014> in <031009ec673a4a808e11b357311ab8f4>:0 
   --- End of inner exception stack trace ---
  at System.TimeZoneInfo.FindSystemTimeZoneByFileName (System.String id, System.String filepath) <0x1f59ef0 + 0x00038> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.FindSystemTimeZoneByIdCore (System.String id) <0x1f596d0 + 0x0001e> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.FindSystemTimeZoneById (System.String id) <0x1f594e8 + 0x00030> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.ConvertTimeBySystemTimeZoneId (System.DateTimeOffset dateTimeOffset, System.String destinationTimeZoneId) <0x1f59398 + 0x00018> in <031009ec673a4a808e11b357311ab8f4>:0 
  at lib.shared.util.Helper.DateTimeHelper.GetEstFromUtc () <0x1f53c90 + 0x00012> in <ea87f8326c3d4dca87bad74658f34e5b>:0 
  at TestBlazor_0_2_0.Client.Pages.Test.TestLibSharedUtilHelper.RunTests () <0x1f53a78 + 0x00022> in <9ce1d538f01b40c39a6a753959ed2ef0>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.Renderer+<>c__DisplayClass13_0.<AssignEventHandlerId>b__0 (Microsoft.AspNetCore.Blazor.UIEventArgs e) <0x1f53908 + 0x00014> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Components.BlazorComponent.Microsoft.AspNetCore.Blazor.Components.IHandleEvent.HandleEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs args) <0x1f53798 + 0x00018> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.ComponentState.DispatchEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1f535c0 + 0x00034> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.Renderer.DispatchEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1f53088 + 0x00050> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRenderer.DispatchBrowserEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1f52f20 + 0x00020> in <08ceae4b872f4f8d8ccefc410a9a8971>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRendererEventDispatcher.DispatchEvent (System.String eventDescriptorJson, System.String eventArgsJson) <0x1f11940 + 0x0005a> in <08ceae4b872f4f8d8ccefc410a9a8971>:0 
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) <0x1f623d8 + 0x00226> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share) <0x1f5a478 + 0x00032> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.IO.File.OpenRead (System.String path) <0x1f5a180 + 0x0000e> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.FindSystemTimeZoneByFileName (System.String id, System.String filepath) <0x1f59ef0 + 0x00014> in <031009ec673a4a808e11b357311ab8f4>:0 
   --- End of inner exception stack trace ---
  at System.TimeZoneInfo.FindSystemTimeZoneByFileName (System.String id, System.String filepath) <0x1f59ef0 + 0x00038> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.FindSystemTimeZoneByIdCore (System.String id) <0x1f596d0 + 0x0001e> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.FindSystemTimeZoneById (System.String id) <0x1f594e8 + 0x00030> in <031009ec673a4a808e11b357311ab8f4>:0 
  at System.TimeZoneInfo.ConvertTimeBySystemTimeZoneId (System.DateTimeOffset dateTimeOffset, System.String destinationTimeZoneId) <0x1f59398 + 0x00018> in <031009ec673a4a808e11b357311ab8f4>:0 
  at lib.shared.util.Helper.DateTimeHelper.GetEstFromUtc () <0x1f53c90 + 0x00012> in <ea87f8326c3d4dca87bad74658f34e5b>:0 
  at TestBlazor_0_2_0.Client.Pages.Test.TestLibSharedUtilHelper.RunTests () <0x1f53a78 + 0x00022> in <9ce1d538f01b40c39a6a753959ed2ef0>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.Renderer+<>c__DisplayClass13_0.<AssignEventHandlerId>b__0 (Microsoft.AspNetCore.Blazor.UIEventArgs e) <0x1f53908 + 0x00014> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Components.BlazorComponent.Microsoft.AspNetCore.Blazor.Components.IHandleEvent.HandleEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs args) <0x1f53798 + 0x00018> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.ComponentState.DispatchEvent (Microsoft.AspNetCore.Blazor.UIEventHandler handler, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1f535c0 + 0x00034> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Rendering.Renderer.DispatchEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1f53088 + 0x00050> in <8a8022566b074cca8a70e10050945cdd>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRenderer.DispatchBrowserEvent (System.Int32 componentId, System.Int32 eventHandlerId, Microsoft.AspNetCore.Blazor.UIEventArgs eventArgs) <0x1f52f20 + 0x00020> in <08ceae4b872f4f8d8ccefc410a9a8971>:0 
  at Microsoft.AspNetCore.Blazor.Browser.Rendering.BrowserRendererEventDispatcher.DispatchEvent (System.String eventDescriptorJson, System.String eventArgsJson) <0x1f11940 + 0x0005a> in <08ceae4b872f4f8d8ccefc410a9a8971>:0 
    at Object.callMethod (http://localhost:49819/_framework/blazor.js:435:23)
    at raiseEvent (http://localhost:49819/_framework/blazor.js:949:28)
    at EventDelegator.onEvent (http://localhost:49819/_framework/blazor.js:692:13)
    at EventDelegator.onGlobalEvent (http://localhost:49819/_framework/blazor.js:1096:26)
callMethod @ MonoPlatform.ts:70
raiseEvent @ BrowserRenderer.ts:304
(anonymous) @ BrowserRenderer.ts:17
EventDelegator.onGlobalEvent @ EventDelegator.ts:77

CODE: - Works fine on server just not in blazor/mono

@using lib.shared.util.Helper
@page "/test/libsharedutilhelper"

<h3>Test Lib.Shared.Util.Heplers</h3>
<p>Test a bunch of static helpers for fun :-)</p>

<button onclick=@RunTests>Run Tests</button>
<p>@TestList</p>

@functions {

    string TestList = "";

    private void RunTests()
    {
        TestList = "Init...";
        TestList += "<br />Get Est From Utc: " + TimeZoneInfo.ConvertTimeBySystemTimeZoneId(DateTimeOffset.UtcNow, "Eastern Standard Time").ToString();
    }
}

I looked at some articles and they suggested this is a mono issue?
https://bugzilla.xamarin.com/show_bug.cgi?id=11817
https://bugzilla.xamarin.com/show_bug.cgi?id=31432
https://stackoverflow.com/questions/18395018/system-timezonenotfoundexception-on-viewpage-using-servicestack-razor
https://www.reddit.com/r/jailbreak/comments/3ll1rf/tutorial_solution_how_to_fix_broken_timezone_in/

Kind of an essential missing piece.. Any workaround ideas? Thoughts?

[Daddoon]

Are you getting an exception when enumerating the TimeZones ?

Like:

tz= TimeZoneInfo.GetSystemTimeZones();

on stackoverflow

[chassq]

Does not throw an exception. There are not any timezones in the readonly collection.

Should Add I am using:
VS 2017 15.7.0 Preview 4.0
Dotnet SDK 2.1.300-preview2-008533
Blazor Language Services 0.2.1-rtm-10237
Chrome 66.0.3359.117
Windows Server 2016 Datacenter (Azure VM for VS preview)

[Daddoon]

I think it's a missing reference, maybe stripped at build ?
I think only MS team will be able to see this.

[SteveSandersonMS]

This is an issue in Mono. Would you be willing to report it to https://github.com/mono/mono/? Thanks!

[chassq]

Issue: mono/mono#8443