.NET Core async transaction: Exit Calls / Threads column empty in Function Trace

[adhi]

Hi Team,

I am testing a simple ASP.NET Core async application with AppDynamics .NET Agent.

The agent is successfully detecting:
- Business Transactions
- HTTP Exit Calls
- Database Calls
- Service Topology
- Async timings

I can see the transaction flow map correctly between ServiceA and ServiceB, and database calls are also visible.

However, in the Transaction Snapshot -> Call Graph / Function Trace view, the “Exit Calls / Threads” column is empty for async execution.

Application Flow:
1. ASP.NET Core endpoint receives request
2. Async HTTP call using HttpClient
3. Async SQLite DB operations
4. Response returned successfully

Sample Code:

```csharp
using Microsoft.AspNetCore.Builder;
using Microsoft.Data.Sqlite;
using Microsoft.Extensions.Hosting;
using System.Net.Http;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

string dbPath = "Data Source=test.db";

using (var conn = new SqliteConnection(dbPath))
{
conn.Open();

var cmd = conn.CreateCommand();
cmd.CommandText =
"CREATE TABLE IF NOT EXISTS Test (Id INTEGER PRIMARY KEY, Name TEXT)";

cmd.ExecuteNonQuery();
}

app.MapGet("/call", async () =>
{
var httpClient = new HttpClient();

var response =
await httpClient.GetStringAsync("http://localhost:5002/api/hello");

using var conn = new SqliteConnection(dbPath);

await conn.OpenAsync();

var insertCmd = conn.CreateCommand();
insertCmd.CommandText =
"INSERT INTO Test (Name) VALUES ('APM Test')";

await insertCmd.ExecuteNonQueryAsync();

var selectCmd = conn.CreateCommand();
selectCmd.CommandText = "SELECT COUNT(*) FROM Test";

var count =
(long)await selectCmd.ExecuteScalarAsync();

return new
{
message = "Service A response",
serviceB = response,
dbCount = count
};
});

app.Run();

Questions:

1. Is this expected behavior for async/await execution in .NET Core?
2. Does AppDynamics correlate async continuations differently from thread-based execution?
3. Is there any configuration needed to populate the Exit Calls / Threads column for async transactions?
4. Does this work differently for synchronous requests?

I have attached screenshots of:

• Transaction Flow Map
• Function Trace / Call Graph

Any clarification would be helpful.

Thanks.