EventSourceException: There are no free buffers available from the operating system.

Question

Full text of exception:

EventSourceException: there are no free buffers available from the operating room (for example, the event rate is too high)

I call this method about a million times due to recursion. This does not stop, I just get the exception text in the "Debug Output" window in VS2013. But it is very slow.

private static IEnumerable<string> RecursiveFindServices(ISymbol sym, Solution sln) { List<string> list = new List<string>(); var callers = SymbolFinder.FindCallersAsync(sym, sln).Result; // this line may cause the EventSourceException (try not to call Async) foreach(var caller in callers) { string name = GetMethodName(caller); if (caller.CallingSymbol.ContainingType.Name.EndsWith("Test")) continue; if (recursiveList.Contains(name)) continue; recursiveList.Add(name); if (IsWebservice(caller)) list.Add(name); else list.AddRange(RecursiveFindServices(caller.CallingSymbol, sln)); } return list; } 

Does anyone know what this exception means and how to fix it. I assume that slow speed is associated with this exception.

IsWebservice() and GetMethodName() are pure string methods.

I am running Roslyn in a VS2013 project under .NET 4.5.2, can this be related to this? I just installed this nuget package

PM> Install-Package Microsoft.CodeAnalysis

And then I had to copy and include the following files in the project.

 Microsoft.Build.Conversion.Core.dll (File Version 14.0) Microsoft.Build.dll (File Version 14.0) Microsoft.Build.Engine.dll (File Version 14.0) Microsoft.Build.Framework.dll (File Version 14.0) Microsoft.Build.Tasks.Core.dll (File Version 14.0) Microsoft.Build.Utilities.Core.dll (File Version 14.0) System.Threading.Tasks.Dataflow.dll (File Version 4.5.24) 

Any ideal to speed up the code or find the root cause of the exception will be helpful. // Thanks: -)

Answer 1

I ran into this problem and also developed a rendering method with VS 2013. I found a solution to stop spamming the console window with the message:

Go to the VS 2013 options menu:

In German it is:

EXTRAS → Optionen ... → Debugging → Allgemein → (check) Verwalteten Kmpatibilitäsmodus verwenden

In English, this is:

TOOLS → Options ... → Debugging → General → (check) Use managed compatibility mode

This will stop the message.

Answer 2

And faced with this exception! Not sure if my C: drive connected or her was full at that time, freeing up some space, did not receive this exception.