iOS tests failing with OSError: [Errno 28] No space left on device

[MihaZupan]

Build

https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1337140

E.g. https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-125526-merge-c11096c024db465987/iOS.Device.ParallelForEachAsync.Test.Attempt.3/f3035da5-b542-43ef-9283-a42707d78008.log

Build leg reported

iOS.Device.Aot.Test.WorkItemExecution

Pull Request

dotnet/runtime#125526

Known issue core information

Fill out the known issue JSON section by following the step by step documentation on how to create a known issue

 {
    "ErrorMessage" : "OSError: [Errno 28] No space left on device",
    "BuildRetry": false,
    "ErrorPattern": "",
    "ExcludeConsoleLog": false
 }

@dotnet/dnceng

Release Note Category

• Feature changes/additions
• Bug fixes
• Internal Infrastructure Improvements

Release Note Description

Additional information about the issue reported

No response

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1337140
Error message validated: [OSError: [Errno 28] No space left on device]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 3/16/2026 4:54:41 PM UTC

Report

Build	Repository	Test	Pull Request
1492827	dotnet/runtime	System.Threading.Thread.Tests.WorkItemExecution
1492684	dotnet/runtime	System.IO.FileSystem.DisabledFileLocking.Tests.WorkItemExecution
1489740	dotnet/runtime	System.Runtime.Serialization.Formatters.Disabled.Tests.WorkItemExecution	dotnet/runtime#130077
1487904	dotnet/runtime	Microsoft.Extensions.Configuration.Tests.WorkItemExecution	dotnet/runtime#130034
1487037	dotnet/runtime	System.Xml.Linq.Properties.Tests.WorkItemExecution
1486312	dotnet/runtime	System.Data.Common.Tests.WorkItemExecution
1485187	dotnet/runtime	System.Drawing.Primitives.Tests.WorkItemExecution
1484402	dotnet/runtime	System.Net.Mail.Unit.Tests.WorkItemExecution
1483966	dotnet/runtime	System.Data.Common.Tests.WorkItemExecution
1482396	dotnet/runtime	System.Net.ServerSentEvents.Tests.WorkItemExecution
1481946	dotnet/runtime	System.Runtime.Loader.DefaultContext.Tests.WorkItemExecution
1477408	dotnet/runtime	Methodical_others.WorkItemExecution	dotnet/runtime#129299
1472667	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1468533	dotnet/runtime	System.Threading.Overlapped.Tests.WorkItemExecution	dotnet/runtime#129514
1467678	dotnet/runtime	Microsoft.Extensions.Diagnostics.Tests.WorkItemExecution
1465808	dotnet/runtime	Microsoft.Extensions.Primitives.Tests.WorkItemExecution
1465781	dotnet/runtime	Microsoft.Extensions.Http.Tests.WorkItemExecution
1465282	dotnet/runtime	Microsoft.Extensions.Logging.Tests.WorkItemExecution
1464635	dotnet/runtime	System.Data.Common.Tests.WorkItemExecution
1464480	dotnet/runtime	Microsoft.Bcl.AsyncInterfaces.Tests.WorkItemExecution
1463443	dotnet/runtime	System.Runtime.Serialization.Formatters.Tests.WorkItemExecution	dotnet/runtime#128409
1461002	dotnet/runtime	System.Formats.Nrbf.Tests.WorkItemExecution
1459629	dotnet/runtime	System.Diagnostics.Process.Tests.WorkItemExecution
1460065	dotnet/runtime	System.Console.Manual.Tests.WorkItemExecution
1458940	dotnet/runtime	System.Net.WebSockets.Client.Tests.WorkItemExecution
1457550	dotnet/runtime	System.Net.WebSockets.Tests.WorkItemExecution	dotnet/runtime#129226
1455809	dotnet/runtime	LoaderClassloaderGenerics.WorkItemExecution	dotnet/runtime#128409
1455662	dotnet/runtime	System.Composition.TypedParts.Tests.WorkItemExecution
1455366	dotnet/runtime	System.Net.Http.Unit.Tests.WorkItemExecution
1453839	dotnet/runtime	System.Composition.Convention.Tests.WorkItemExecution
1453379	dotnet/runtime	Microsoft.Extensions.Logging.Console.Tests.WorkItemExecution
1452872	dotnet/runtime	System.Xml.Linq.xNodeBuilder.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	7	32