Realm creates a pipe file, which cannot be created on an SD card formatted in FAT32 and mounted under Linux.

[embeddedmz]

What happened?

I can't store the database on an SD card formatted in FAT32 because Realm creates a pipe/fifo and this cannot be created on an exFAT/FAT32 file system.

How can I disable this feature or ask Realm to use another location to create its fifo.

Repro steps

Use a FAT32 SD card on your GNU/Linux system to store the database

Version

6

What Atlas Services are you using?

Local Database only

What type of application is this?

Console/Server

Client OS and version

Ubuntu 18.04 LTS

Code snippets

No response

Stacktrace of the exception/crash you're getting

2023-11-29T22:00:12 0000007291 - EXC Microsoft.AspNetCore.Hosting.Diagnostics Application startup exception
Realms.Exceptions.RealmException: Failed to create fifo at '/media/sd/MMC Disk/DATA/Realm/ProjectDataStore.realm.note': Operation not permitted
2023-11-29T22:00:12 0000007383 - ERR Main APP CRASH Failed to create fifo at '/media/sd/MMC Disk/DATA/Realm/ProjectDataStore.realm.note': Operation not permitted terminatingTrue
2023-11-29T22:00:12 0000007395 - EXC  UnhandledException Realms.Exceptions.RealmException: Failed to create fifo at '/media/sd/MMC Disk/DATA/Realm/ProjectDataStore.realm.note': Operation not permitted: Failed to create fifo at '/media/sd/MMC Disk/DATA/Realm/ProjectDataStore.realm.note': Operation not permitted
   at Realms.NativeException.ThrowIfNecessary()
   at Realms.SharedRealmHandle.Open(Configuration configuration, RealmSchema schema, Byte[] encryptionKey)
   at Realms.RealmConfiguration.CreateHandle(RealmSchema schema)
   at Realms.RealmConfigurationBase.CreateRealm()
   at Realms.Realm.GetInstance(RealmConfigurationBase config)
   at Jlsa.Device.ProjectDataStoreRealm.RealmProjectDataDB_MonoThread.InitializeRealm() in D:\DevProjects\jlsa.device.projectdatastore\Jlsa.Device.ProjectDataStoreRealm\RealmProjectDataDB_MonoThread.cs:line 44
   at Jlsa.Device.ProjectDataStoreRealm.RealmProjectDataDB_MonoThread.<Initialize>b__10_0() in D:\DevProjects\jlsa.device.projectdatastore\Jlsa.Device.ProjectDataStoreRealm\RealmProjectDataDB_MonoThread.cs:line 83
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.<>c.<.cctor>b__274_0(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location where exception was thrown ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
--- End of stack trace from previous location where exception was thrown ---
   at Jlsa.Device.ProjectDataStoreRealm.RealmProjectDataDB_MonoThread.Exe[T](Func`1 fnc) in D:\DevProjects\jlsa.device.projectdatastore\Jlsa.Device.ProjectDataStoreRealm\RealmProjectDataDB_MonoThread.cs:line 37
   at Jlsa.Device.ProjectDataStoreRealm.RealmProjectDataDB_MonoThread.Initialize(String storeDir) in D:\DevProjects\jlsa.device.projectdatastore\Jlsa.Device.ProjectDataStoreRealm\RealmProjectDataDB_MonoThread.cs:line 83
   at Jlsa.Device.ProjectDataStore2.GenericProjectDataStore2.Initialize(String storeDir) in D:\DevProjects\Jlsa.Device.ProjectDataStore\Jlsa.Device.ProjectDataStore\GenericProjectDataStore2.cs:line 70
   at AdnServer.SignalR.SignalRServer.ProjectDataStore2Factory(IServiceProvider serviceProvider) in D:\DevProjects\adn2\Mobile\ADN\AdnServer\SignalR\SignalRServer.cs:line 63
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
   at AdnServer.SignalR.SignalRServer.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env) in D:\DevProjects\adn2\Mobile\ADN\AdnServer\SignalR\SignalRServer.cs:line 103
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.<UseStartup>b__2(IApplicationBuilder app)
   at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
   at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
   at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location where exception was thrown ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

Relevant log output

No response

[nirinchev]

You can use RealmConfiguration.FallbackPipePath and give it a location where pipes are creatable. That location doesn't need to be adjacent to the Realm file and the pipes will get removed once the Realm file is closed.

[nirinchev]

Closing the issue - feel free to reopen if that doesn't resolve it.