Bug IOException : eventcache is being used by another process

Hi,

We have a game in early access on Steam and we are using UnityAnalytics.

A player has issues and send us the Player.log file, in which we have this error :

Unable to read event cache file: corrupt
IOException: The process cannot access the file 'C:\Users\<username>\AppData\LocalLow\<CompanyName>\<GameName>\eventcache' because it is being used by another process.

Do you know how we can fix this ?

Unity version : 2021.3.12f1
The code line involved is just :

Code (CSharp):

1.             await Analytics.Initialize();
2.  

Here is the stack trace :

Unable to read event cache file: corrupt



IOException: The process cannot access the file 'C:\Users\<username>\AppData\LocalLow\CompanyName\GameName\eventcache' because it is being used by another process.

at [URL='http://system.io/']System.IO[/URL].FileSystem.DeleteFile (System.String fullPath) [0x0001a] in <c9d3ffd4b98649ee9989e1908eaca019>:0

at [URL='http://system.io/']System.IO[/URL].File.Delete (System.String path) [0x00014] in <c9d3ffd4b98649ee9989e1908eaca019>:0

at Unity.Services.Analytics.Internal.FileSystemCalls.DeleteFile (System.String path) [0x00000] in <ec4bb24484644e59ad08412540ef0cbb>:0

at Unity.Services.Analytics.Internal.DiskCache.Clear () [0x00020] in <ec4bb24484644e59ad08412540ef0cbb>:0

at Unity.Services.Analytics.Internal.DiskCache.Read (System.Collections.Generic.List`1[T] eventEndIndices, System.IO.Stream buffer) [0x000a5] in <ec4bb24484644e59ad08412540ef0cbb>:0

at Unity.Services.Analytics.Internal.BufferX.LoadFromDisk () [0x00000] in <ec4bb24484644e59ad08412540ef0cbb>:0

at Ua2CoreInitializeCallback.Initialize (Unity.Services.Core.Internal.CoreRegistry registry) [0x000ef] in <ec4bb24484644e59ad08412540ef0cbb>:0

at Unity.Services.Core.Internal.CoreRegistryInitializer+<>c__DisplayClass3_0.<InitializeRegistryAsync>g__TryInitializePackageAsync|0 (Unity.Services.Core.Internal.IInitializablePackage package) [0x00083] in <7d85b28f15f14746876359a629bdd631>:0



Rethrow as AggregateException: One or more errors occurred. (The process cannot access the file 'C:\Users\<username>\AppData\LocalLow\<ComparnyName>\<GameName>\eventcache' because it is being used by another process.)Rethrow as ServicesInitializationException: Some services couldn't be initialized. Look at inner exceptions to get more information.

at Unity.Services.Core.Internal.CoreRegistryInitializer+<>c__DisplayClass3_0.<InitializeRegistryAsync>g__Fail|2 () [0x00017] in <7d85b28f15f14746876359a629bdd631>:0

at Unity.Services.Core.Internal.CoreRegistryInitializer.InitializeRegistryAsync () [0x001b3] in <7d85b28f15f14746876359a629bdd631>:0

at Unity.Services.Core.Internal.UnityServicesInternal+<>c__DisplayClass22_0.<InitializeServicesAsync>g__InitializePackagesAsync|1 () [0x00077] in <7d85b28f15f14746876359a629bdd631>:0

at Unity.Services.Core.Internal.UnityServicesInternal.InitializeServicesAsync () [0x00141] in <7d85b28f15f14746876359a629bdd631>:0

at Unity.Services.Core.Internal.UnityServicesInternal.InitializeAsync (Unity.Services.Core.InitializationOptions options) [0x00103] in <7d85b28f15f14746876359a629bdd631>:0

at Unity.Services.Core.UnityServices.InitializeAsync (Unity.Services.Core.InitializationOptions options) [0x0011b] in <6a2feefaee344e33ba88f8381ca1b475>:0

at Analytics.Initialize () [0x000a9] in <e9f6a97ce3c04aafb1da4ab3a6f5c734>:0

at SteamAuthWebService+<>c__DisplayClass1_0.<SteamLogIn>b__0 (SteamLoginResponse response) [0x000b7] in <e9f6a97ce3c04aafb1da4ab3a6f5c734>:0

at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__7_0 (System.Object state) [0x00000] in <c9d3ffd4b98649ee9989e1908eaca019>:0

at UnityEngine.UnitySynchronizationContext+WorkRequest.Invoke () [0x00002] in <6f35c1a2b2d34f8b908ede6136862ef9>:0

at UnityEngine.UnitySynchronizationContext.Exec () [0x00056] in <6f35c1a2b2d34f8b908ede6136862ef9>:0

at UnityEngine.UnitySynchronizationContext.ExecuteTasks () [0x00014] in <6f35c1a2b2d34f8b908ede6136862ef9>:0

UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object)

UnityEngine.DebugLogHandler:LogException(Exception, Object)

Sentry.Unity.Integrations.UnityLogHandlerIntegration:LogException(Exception, Object)

UnityEngine.Logger:LogException(Exception, Object)

UnityEngine.Debug:CallOverridenDebugHandler(Exception, Object)

 

I suppose you did replace "CompanyName" and "GameName" in that string?

Otherwise I would expect a conflict with another Unity app which also did not change these Player Settings to something unique.

I can also imagine the user opening the same app multiple times. I know a couple "twitch-finger" users who have a tendency to triple- and sometimes quadruple-click an app icon and just got into the habit of then closing any excess window they had opened rather than changing their double-click behaviour.

Make sure that Player Setting are set to "disallow multiple instances" (something by that name).

 

Something is blocking the analytics cache file, either they have multiple instances of your game running or some security or application is blocking it. I don't think there's much you can do, besides trying to ask them to reboot or to delete the file, and see if the problem still persists.

The least you can do is to catch the exception that

Analytics.Initialize()

is throwing. Then you can either silently disable analytics or show an error message.

 

Thank you for your answers !

Indeed, I replaced the username, our company name and game name in that string ^^'

'C:\Users<username>\AppData\LocalLow\CompanyName\GameName\eventcache'

The player is supposed to launch the game via Steam, I'm going to do some tests to see if I can launch several instances of the game and reproduct the bug on my PC.