The type initializer for 'TimeZoneConverter.TZConvert' threw an exception

[c0shea]

We upgraded to Seq 2023.1.8948 the other day and since then we are unable to send emails using the Seq.App.EmailPlus app. We're using version 4.0.0-dev-00218 of the plugin.

Any time it goes to send an email of an event matching the signals we have defined, it throws an exception and fails to send.

System.TypeInitializationException: The type initializer for 'TimeZoneConverter.TZConvert' threw an exception.
 ---> System.IO.Compression.ZLibException: The underlying compression routine could not be loaded correctly.
 ---> System.DllNotFoundException: Unable to load DLL 'System.IO.Compression.Native' or one of its dependencies: The specified module could not be found. (0x8007007E)
   at System.IO.Compression.ZLibNative.ZLibStreamHandle.InflateInit2_(Int32 windowBits)
   at System.IO.Compression.Inflater.InflateInit(Int32 windowBits)
   --- End of inner exception stack trace ---
   at System.IO.Compression.Inflater.InflateInit(Int32 windowBits)
   at System.IO.Compression.DeflateStream..ctor(Stream stream, CompressionMode mode, Boolean leaveOpen, Int32 windowBits, Int64 uncompressedSize)
   at System.IO.Compression.GZipStream..ctor(Stream stream, CompressionMode mode, Boolean leaveOpen)
   at TimeZoneConverter.DataLoader.GetEmbeddedData(String resourceName)+MoveNext()
   at TimeZoneConverter.DataLoader.Populate(IDictionary`2 ianaMap, IDictionary`2 windowsMap, IDictionary`2 railsMap, IDictionary`2 inverseRailsMap)
   at TimeZoneConverter.TZConvert..cctor()
   --- End of inner exception stack trace ---
   at TimeZoneConverter.TZConvert.GetTimeZoneInfo(String windowsOrIanaTimeZoneId)
   at Seq.App.EmailPlus.HandlebarsHelpers.DateTimeHelper(Context context, Arguments arguments) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\HandlebarsHelpers.cs:line 152
   at HandlebarsDotNet.Helpers.DelegateReturnHelperDescriptor.Invoke(EncodedTextWriter& output, HelperOptions& options, Context& context, Arguments& arguments)
   at HandlebarsDotNet.Helpers.DelegateReturnHelperDescriptor.HandlebarsDotNet.Helpers.IHelperDescriptor<HandlebarsDotNet.HelperOptions>.Invoke(EncodedTextWriter& output, HelperOptions& options, Context& context, Arguments& arguments)
   at lambda_method125(Closure, EncodedTextWriter&, BindingContext)
   at HandlebarsDotNet.HandlebarsEnvironment.<>c__DisplayClass19_0.<Compile>b__0(TextWriter writer, Object context, Object data)
   at HandlebarsDotNet.HandlebarsEnvironment.<>c__DisplayClass20_0.<Compile>b__0(Object context, Object data)
   at Seq.App.EmailPlus.EmailApp.FormatTemplate(HandlebarsTemplate`2 template, Event`1 evt, Host host, String dateTimeFormat, String timeZoneName) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\EmailApp.cs:line 234
   at Seq.App.EmailPlus.EmailApp.FormatTemplate(HandlebarsTemplate`2 template, Event`1 evt, Host host) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\EmailApp.cs:line 239
   at Seq.App.EmailPlus.EmailApp.OnAsync(Event`1 evt) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\EmailApp.cs:line 154
   at SeqCli.Apps.Hosting.AppContainer.SendTypedEventAsync(String clef) in C:\projects\seqcli\src\SeqCli\Apps\Hosting\AppContainer.cs:line 113

[nblumhardt]

Thanks for the note! Are you on Windows or Linux?

I've just tried 4.0.0 of the email app (just released) on Windows with that Seq version and all appears okay - perhaps upgrading to 4.0.0 of the email app would be a good thing to try next?

[c0shea]

Running on Windows. I can try and see what happens.On Feb 23, 2023 4:51 PM, Nicholas Blumhardt ***@***.***> wrote: Thanks for the note! Are you on Windows or Linux? I've just tried 4.0.0 of the email app (just released) on Windows with that Seq version and all appears okay - perhaps upgrading to 4.0.0 of the email app would be a good thing to try next? —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[c0shea]

I upgraded to 4.0.0 of the email app and I'm still getting the exception when it tries to send an email

System.TypeInitializationException: The type initializer for 'TimeZoneConverter.TZConvert' threw an exception.
 ---> System.IO.Compression.ZLibException: The underlying compression routine could not be loaded correctly.
 ---> System.DllNotFoundException: Unable to load DLL 'System.IO.Compression.Native' or one of its dependencies: The specified module could not be found. (0x8007007E)
   at System.IO.Compression.ZLibNative.ZLibStreamHandle.InflateInit2_(Int32 windowBits)
   at System.IO.Compression.Inflater.InflateInit(Int32 windowBits)
   --- End of inner exception stack trace ---
   at System.IO.Compression.Inflater.InflateInit(Int32 windowBits)
   at System.IO.Compression.DeflateStream..ctor(Stream stream, CompressionMode mode, Boolean leaveOpen, Int32 windowBits, Int64 uncompressedSize)
   at System.IO.Compression.GZipStream..ctor(Stream stream, CompressionMode mode, Boolean leaveOpen)
   at TimeZoneConverter.DataLoader.GetEmbeddedData(String resourceName)+MoveNext()
   at TimeZoneConverter.DataLoader.Populate(IDictionary`2 ianaMap, IDictionary`2 windowsMap, IDictionary`2 railsMap, IDictionary`2 inverseRailsMap)
   at TimeZoneConverter.TZConvert..cctor()
   --- End of inner exception stack trace ---
   at TimeZoneConverter.TZConvert.GetTimeZoneInfo(String windowsOrIanaTimeZoneId)
   at Seq.App.EmailPlus.HandlebarsHelpers.DateTimeHelper(Context context, Arguments arguments) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\HandlebarsHelpers.cs:line 152
   at HandlebarsDotNet.Helpers.DelegateReturnHelperDescriptor.Invoke(EncodedTextWriter& output, HelperOptions& options, Context& context, Arguments& arguments)
   at HandlebarsDotNet.Helpers.DelegateReturnHelperDescriptor.HandlebarsDotNet.Helpers.IHelperDescriptor<HandlebarsDotNet.HelperOptions>.Invoke(EncodedTextWriter& output, HelperOptions& options, Context& context, Arguments& arguments)
   at lambda_method125(Closure, EncodedTextWriter&, BindingContext)
   at HandlebarsDotNet.HandlebarsEnvironment.<>c__DisplayClass19_0.<Compile>b__0(TextWriter writer, Object context, Object data)
   at HandlebarsDotNet.HandlebarsEnvironment.<>c__DisplayClass20_0.<Compile>b__0(Object context, Object data)
   at Seq.App.EmailPlus.EmailApp.FormatTemplate(HandlebarsTemplate`2 template, Event`1 evt, Host host, String dateTimeFormat, String timeZoneName) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\EmailApp.cs:line 234
   at Seq.App.EmailPlus.EmailApp.FormatTemplate(HandlebarsTemplate`2 template, Event`1 evt, Host host) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\EmailApp.cs:line 239
   at Seq.App.EmailPlus.EmailApp.OnAsync(Event`1 evt) in C:\projects\seq-app-htmlemail\src\Seq.App.EmailPlus\EmailApp.cs:line 154
   at SeqCli.Apps.Hosting.AppContainer.SendTypedEventAsync(String clef) in C:\projects\seqcli\src\SeqCli\Apps\Hosting\AppContainer.cs:line 113

[nblumhardt]

Ah, interesting - thanks for the extra info.

I think this is a limitation in Seq's app loader that is being triggered by the new date/time formatting functions in 4.0 depending on some platform-specific binaries.

Strange that it wouldn't be reproducible on our test Windows box 🤔 - it could be something to do with the template, are you using the default body template?

Might also help to know the Windows version etc.; if you're able to shoot a diagnostic report through to support@ we can dig in deeper there. Thanks!

[c0shea]

Yes, I'm using the default template. Running on Windows Server 2012 R2.I didn't think it would, but I also tried installing .NET 6 and 7 runtimes on the server and that didn't make a difference.I did notice that the nupkg targets netstandard2.0 and net6 but not net7 yet the missing dll in the Seq install folder is for net7.On Feb 24, 2023 8:29 PM, Nicholas Blumhardt ***@***.***> wrote: Ah, interesting - thanks for the extra info. I think this is a limitation in Seq's app loader that is being triggered by the new date/time formatting functions in 4.0 depending on some platform-specific binaries. Strange that it wouldn't be reproducible on our test Windows box 🤔 - it could be something to do with the template, are you using the default body template? Might also help to know the Windows version etc.; if you're able to shoot a diagnostic report through to support@ we can dig in deeper there. Thanks! —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[nblumhardt]

Thanks for following up with all of the info 👍

I'm reasonably sure the problem is OS-dependent; this ticket is tracking the basic problem that will be the root cause:

datalust/seqcli#252

I will need to dig into that ticket to determine how much time a fix is going to require; I'll post an update as soon as I have more info.

In the meantime, using the "Manage" link to roll back the version of the HTML email app you're using might be the only quick workaround, unfortunately.

[c0shea]

Thanks! I'm not sure which version I'd rollback the HTML email app to, though. Both the dev and 4.0.0 version fail for me. That only started happening when I upgraded Seq from 2022.1 (I think it was 7929) to 2023.1.8948

[nblumhardt]

I think 3.1.1-dev-00213 pre-dates any use of the functions that will cause the error; let me know if you still hit problems with that version.

[c0shea]

3.1.1-dev-00213 is working for me until this is fixed. Thanks!

[nblumhardt]

Hi @c0shea, we've cooked up a couple of theories about how this might be happening, and published build 4.0.1-dev-00224 to try them out.

If it's possible to update to this build, it'd be great to hear whether the issue is resolved. Thanks!

[c0shea]

I installed the latest update. It seems promising! I haven't had any events come through the signals setup for the instances I have of the email app yet, but I did create a test instance of the app and manually send an event from the stream to it and it worked (where it previously didn't). I should have some events come through email overnight so I'll check back with you tomorrow. Thanks 😀

[nblumhardt]

Great! Thanks @c0shea 👍