Container seq terminated with ExitCode 1

[Mike-E-angelo]

Greetings Team Seq 👋

I am setting up another instance of Seq but this one does not involve SSL. When I do so, I get the following error message:

Also, attempting to use the Connect tab results in the following:

Connection closed. Press Enter to reconnect.

I did a search for Container seq terminated with ExitCode 1 for possible ways to troubleshoot this, but it turned up empty in both Bing and Google. That's a first. 😅 Any guidance on how to see what is happening here would be greatly appreciated.

[liammclennan]

Hi @Mike-E-angelo,

If Seq is terminating it will write an error log. Have a look wherever Azure puts the container output.

[Mike-E-angelo]

HI @liammclennan thank you for your assistance. This is really perplexing to me as all the obvious locations I have looked at do not contain meaningful information. Here is the Logs tab:

It would seem that if the container is being restarted it would emit the reason here, but it does not. I am unsure where else to look but will continue to prod around.

[liammclennan]

You can find Seq's logs in /Logs on the file system, or you can configure Seq to log to another Seq (diagnostics.internalLogServerUrl and diagnostics.internalLogServerApiKey).

[Mike-E-angelo]

Got it! Thank you for that @liammclennan here is the error:

{"@t":"2025-07-15T20:24:19.7197658Z","@mt":"Failed to start server","@l":"Fatal","@x":"Autofac.Core.DependencyResolutionException: An exception was thrown while activating λ:Seq.Cluster.SeqNode.\n ---> System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.\n  
 at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)\n   at System.Convert.FromBase64String(String s)\n   at Seq.Config.Encoding.Base64SaltedHashEncoding.FromBase64(String base64)\n   at Seq.Data.Users.Migrations.CreateAdminUser.Apply(DocumentSession session)\n   at Seq.Metastore.Native.NativeDocumentStore.Migrate(MigrationList migrations)\n   at Seq.Cluster.SeqNode.Initialize(IComponentContext ctx, SeqConfig config, StorageLayout layout, String instanceName)\n   at Seq.Server.SeqServerModule.<Load>b__9_14(IComponentContext c)\n   at Autofac.RegistrationExtensions.<>c__DisplayClass41_0`1.<Register>b__0(IComponentContext c, IEnumerable`1 p)\n   at Autofac.Builder.RegistrationBuilder.<>c__DisplayClass0_0`1.<ForDelegate>b__0(IComponentContext c, IEnumerable`1 p)\n   at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable`1 parameters)\n   at Autofac.Core.Activators.Delegate.DelegateActivator.<ConfigurePipeline>b__2_0(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Middleware.DelegateMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Core.Resolving.Middleware.DisposalTrackingMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Extensions.DependencyInjection.KeyedServiceMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Core.Resolving.Middleware.ActivatorErrorHandlingMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   --- End of inner exception stack trace ---\n   at Autofac.Core.Resolving.Middleware.ActivatorErrorHandlingMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Core.Pipeline.ResolvePipeline.Invoke(ResolveRequestContext context)\n   at Autofac.Core.Resolving.Middleware.RegistrationPipelineInvokeMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Core.Resolving.Middleware.SharingMiddleware.<>c__DisplayClass5_0.<Execute>b__0()\n   at Autofac.Core.Lifetime.LifetimeScope.CreateSharedInstance(Guid id, Func`1 creator)\n   at Autofac.Core.Lifetime.LifetimeScope.CreateSharedInstance(Guid primaryId, Nullable`1 qualifyingId, Func`1 creator)\n   at Autofac.Core.Resolving.Middleware.SharingMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Core.Resolving.Middleware.CircularDependencyDetectorMiddleware.Execute(ResolveRequestContext context, Action`1 next)\n   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.<>c__DisplayClass14_0.<BuildPipeline>b__1(ResolveRequestContext context)\n   at Autofac.Core.Pipeline.ResolvePipeline.Invoke(ResolveRequestContext context)\n   at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, ResolveRequest& request)\n   at Autofac.Core.Resolving.ResolveOperation.ExecuteOperation(ResolveRequest& request)\n   at Autofac.Core.Resolving.ResolveOperation.Execute(ResolveRequest& request)\n   at Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(ResolveRequest& request)\n   at Autofac.Core.Container.ResolveComponent(ResolveRequest& request)\n   at Autofac.Core.Container.Autofac.IComponentContext.ResolveComponent(ResolveRequest& request)\n   at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)\n   at Autofac.ResolutionExtensions.ResolveService(IComponentContext context, Service service, IEnumerable`1 parameters)\n   at Autofac.ResolutionExtensions.Resolve(IComponentContext context, Type serviceType, IEnumerable`1 parameters)\n   at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context, IEnumerable`1 parameters)\n   at Autofac.ResolutionExtensions.Resolve[TService](IComponentContext context)\n   at Seq.ServiceProcess.ServerService.<RunImplAsync>b__11_0(CancellationToken _)\n   at Seq.Engine.Workers.WorkerPool.<>c__DisplayClass7_0`1.<Run>g__DoWork|0()\n   at System.Threading.Tasks.Task`1.InnerInvoke()\n   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)\n--- End of stack trace from previous location ---\n   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)\n   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)\n--- End of stack trace from previous location ---\n   at Seq.ServiceProcess.ServerService.RunImplAsync()\n   at Seq.Cli.RunCommand.RunStandardIOAsync(Func`1 bootstrap, TextWriter cout)"}

Looks like it is complaining about the administrator username. I am using the same UPN pattern from the Entra-based instance I also have, so I am guessing that is the problem. I would greatly appreciate any consideration toward surfacing this error in a more usable way (ideally to the Logs tab). Thank you for your consideration and assistance.

[liammclennan]

Is it possible that you are setting the firstRun.adminPasswordHash to a value that is not base64 encoded? You can use firstRun.adminPassword if you want to specify an un-hashed password. See https://datalust.co/docs/json-config#firstrun.adminpassword

[Mike-E-angelo]

Indeed @liammclennan I was getting bit by passing a PowerShell param via a variable. I was passing this:

--parameter hash=$hash.Hash

Changing it to this:

--parameter hash="$($hash.Hash)"

Fixed the issue.

[liammclennan]

Ah! Good to know. Thanks.