systemtimeoutexception cannot acquire maindom - Using Umbraco and getting started

Sorin Botezatu 1 post 71 karma points

Mar 21, 2024 @ 00:37

System.TimeoutException: Cannot acquire MainDom

Hi Everyone,

I see this issue is not new but I was unable to find something that works. Any help is appreciated.

I am running V13.2.2. with db on SQL Express and its working fine on my development system. When I deployed the site on the server (IIS) using Publish from Visual Studio. I am getting:

Unhandled exception. System.TimeoutException: Cannot acquire MainDom
   at Umbraco.Cms.Core.Runtime.MainDom.Acquire()
   at Umbraco.Cms.Core.Runtime.MainDom.<>c__DisplayClass12_0.<Acquire>b__0()
   at System.Threading.LazyInitializer.EnsureInitializedCore[T](T& target, Boolean& initialized, Object& syncLock, Func`1 valueFactory)
   at System.Threading.LazyInitializer.EnsureInitialized[T](T& target, Boolean& initialized, Object& syncLock, Func`1 valueFactory)
   at Umbraco.Cms.Core.Runtime.MainDom.Acquire(IApplicationShutdownRegistry hostingEnvironment)
   at Umbraco.Cms.Infrastructure.Runtime.CoreRuntime.AcquireMainDom()
   at Umbraco.Cms.Infrastructure.Runtime.CoreRuntime.StartAsync(CancellationToken cancellationToken, Boolean isRestarting)
   at Umbraco.Cms.Infrastructure.Runtime.CoreRuntime.StartAsync(CancellationToken cancellationToken)
   at Umbraco.Extensions.WebApplicationExtensions.BootUmbracoAsync(WebApplication app)
   at Program.<Main>$(String[] args) in D:\DEV\MEDAMERICA\MedAmerica\Program.cs:line 12
   at Program.<Main>(String[] args)

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waris 3 posts 73 karma points

Mar 22, 2024 @ 10:30

Hello Sorin, Could you please let me know about the project that you upgrade the project or you had build in version 13 ??

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Jonas Ragnarsson 1 post 71 karma points

Mar 22, 2024 @ 18:45

I have exactly the same problem running v13.0.3. Working in both my development env and in Azure but deployed to IIS I get this error.

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J D 2 posts 72 karma points

Mar 28, 2024 @ 06:24

even i am getting the same error where i have web.config as follows. I am using sql db with umbraco version 13.1.1 and throws the same error i also tries to implement with sqlite db still error was same while deploying in iis server.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <handlers>
        <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
      </handlers>
      <aspNetCore processPath="dotnet" arguments=".\sqlDemo.dll" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" hostingModel="inprocess" >
      <environmentVariables>
        <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="Development" />
      </environmentVariables>
      </aspNetCore>
    </system.webServer>
  </location>
</configuration>

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Ahmet Kaplan 1 post 71 karma points

Mar 28, 2024 @ 10:19

I'm getting a similar error too. I searched all over the internet but couldn't find anything. I am using Umbraco version 13.2.2. Please can you help?

TimeoutException: Cannot acquire MainDom
Umbraco.Cms.Core.Runtime.MainDom.Acquire()
Umbraco.Cms.Core.Runtime.MainDom+<>c__DisplayClass12_0.<Acquire>b__0()
System.Threading.LazyInitializer.EnsureInitializedCore<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
System.Threading.LazyInitializer.EnsureInitialized<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
Umbraco.Cms.Core.Runtime.MainDom.Acquire(IApplicationShutdownRegistry hostingEnvironment)
Umbraco.Cms.Infrastructure.Runtime.CoreRuntime.AcquireMainDom()
Umbraco.Cms.Infrastructure.Runtime.CoreRuntime.StartAsync(CancellationToken cancellationToken, bool isRestarting)
Umbraco.Cms.Infrastructure.Runtime.CoreRuntime.StartAsync(CancellationToken cancellationToken)
Umbraco.Extensions.WebApplicationExtensions.BootUmbracoAsync(WebApplication app)
Program.<Main>$(string[] args) in Program.cs
Program.<Main>(string[] args)

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Niklas Fanhgol 2 posts 73 karma points

Apr 06, 2024 @ 10:13

I am running the exact same settup en getting the same error umbraco: 13.1.1 Db: SQLSERVEREXPRESS IIS: 10.0.19041.1

The site runs fine from Visual studio but when i publish to my win11 server this error popps up. I thought it might be an connection string issue butt no changes to the connection string affects the error in any way so i think it triggers before reaching out to the DB My publish settings are as follows enter image description here

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Niklas Fanhgol 2 posts 73 karma points

Apr 06, 2024 @ 10:52

I figured out the issue. The IIS_IUSRS user is missing permissions folder where the files are located.

Refference: https://docs.umbraco.com/umbraco-cms/fundamentals/setup/server-setup/permissions I gave mine all permissions and it solved the issue enter image description here

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System.TimeoutException: Cannot acquire MainDom