无法连接Azure AI Foundry AgentsClient：DNS解析失败问题求助

错误日志 #

[DEBUG] .NET DNS resolution failed: nodename nor servname provided, or not known
[DEBUG] Inner Exception Type: Azure.RequestFailedException

前置信息 #

• 模型及端点调用均正常
• 已从Azure AI Foundry门户的项目详情>项目连接字符串中获取正确的连接字符串，通过var connectionString = System.Environment.GetEnvironmentVariable("PROJECT_CONNECTION_STRING");配置后实例化AgentsClient对象

运行代码 #

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

#nullable disable

using Azure.Identity;
using Azure.Core;
namespace Azure.AI.Projects;

public class Sample_Agent
{
    static async Task Main()
    {
        Console.WriteLine($"Application started at: {DateTime.Now:yyyy-MM-dd HH:mm:ss}");
        Console.WriteLine("Initializing agent configuration...");
        
        // Use explicit connection string as requested
        var connectionString = "<project connection string I scrubbed, format: <HostName>;<AzureSubscriptionId>;<ResourceGroup>;<ProjectName>>";
        Console.WriteLine($"[DEBUG] Using connection string: {connectionString.Substring(0, Math.Min(connectionString.Length, 20))}... (masked)");
        Console.WriteLine($"[DEBUG] Machine Name: {Environment.MachineName}");
        Console.WriteLine($"[DEBUG] OS Version: {Environment.OSVersion}");
        Console.WriteLine($"[DEBUG] Current Directory: {Environment.CurrentDirectory}");
        try
        {
            var host = "eastus.api.azureml.ms";
            Console.WriteLine($"[DEBUG] .NET DNS test for {host}");
            var entry = System.Net.Dns.GetHostEntry(host);
            Console.WriteLine($"[DEBUG] .NET DNS resolved: {entry}");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"[DEBUG] .NET DNS resolution failed: {ex.Message}");
        }
        var options = new AIProjectClientOptions();
        options.Retry.MaxRetries = 1;
        AgentsClient client = new AgentsClient(connectionString, new DefaultAzureCredential(), options);
        
        try 
        {
            Console.WriteLine("[DEBUG] Attempting to retrieve agent by ID");
            Response<Agent> agentResponse = await client.GetAgentAsync("<agent id I scrubbed>");
            Agent agent = agentResponse.Value;
            Console.WriteLine($"✓ Agent retrieved successfully (ID: {agent.Id})");

            // Verify agent in list
            Console.WriteLine("\nVerifying agent in list...");
            Response<PageableList<Agent>> agentListResponse = await client.GetAgentsAsync();
            Console.WriteLine($"✓ Found {agentListResponse.Value.Data.Count} agent(s) in total");

            // Step 2: Create a thread
            Console.WriteLine("\n=== Creating Thread ===");
            Response<AgentThread> threadResponse = await client.CreateThreadAsync();
            AgentThread thread = threadResponse.Value;
            Console.WriteLine($"✓ Thread created successfully (ID: {thread.Id})");

            // Step 3: Add a message
            Console.WriteLine("\n=== Adding Message to Thread ===");
            string userMessage = "I need to solve the equation `3x + 11 = 14`. Can you help me?";
            Console.WriteLine($"User message: {userMessage}");
            Response<ThreadMessage> messageResponse = await client.CreateMessageAsync(
                thread.Id,
                MessageRole.User,
                userMessage);
            ThreadMessage message = messageResponse.Value;
            Console.WriteLine($"✓ Message added successfully (ID: {message.Id})");

            // Verify message in thread
            Console.WriteLine("\nVerifying message in thread...");
            Response<PageableList<ThreadMessage>> messagesListResponse = await client.GetMessagesAsync(thread.Id);
            Console.WriteLine($"✓ Found {messagesListResponse.Value.Data.Count} message(s) in thread");

            // Step 4: Run the agent
            Console.WriteLine("\n=== Starting Agent Run ===");
            Response<ThreadRun> runResponse = await client.CreateRunAsync(
                thread.Id,
                agent.Id,
                additionalInstructions: "");
            ThreadRun run = runResponse.Value;
            Console.WriteLine($"✓ Run initiated (ID: {run.Id})");

            // Monitor run progress
            int pollCount = 0;
            Console.WriteLine("\nMonitoring run progress:");
            do
            {
                pollCount++;
                Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Status: {runResponse.Value.Status} (Poll #{pollCount})");
                await Task.Delay(TimeSpan.FromMilliseconds(500));
                runResponse = await client.GetRunAsync(thread.Id, runResponse.Value.Id);
            }
            while (runResponse.Value.Status == RunStatus.Queued
                || runResponse.Value.Status == RunStatus.InProgress);

            Console.WriteLine($"\n✓ Run completed with status: {runResponse.Value.Status}");
            if (runResponse.Value.LastError != null)
            {
                Console.WriteLine($"⚠ Last error: {runResponse.Value.LastError.Message}");
            }

            // Get final messages
            Console.WriteLine("\n=== Final Message History ===");
            Response<PageableList<ThreadMessage>> afterRunMessagesResponse = await client.GetMessagesAsync(thread.Id);
            IReadOnlyList<ThreadMessage> messages = afterRunMessagesResponse.Value.Data;
            Console.WriteLine($"Retrieved {messages.Count} total messages\n");

            Console.WriteLine("Message Timeline:");
            Console.WriteLine("----------------");
            foreach (ThreadMessage threadMessage in messages)
            {
                Console.WriteLine($"\n[{threadMessage.CreatedAt:yyyy-MM-dd HH:mm:ss}]");
                Console.WriteLine($"Role: {threadMessage.Role}");
                Console.WriteLine("Content:");
                foreach (MessageContent contentItem in threadMessage.ContentItems)
                {
                    if (contentItem is MessageTextContent textItem)
                    {
                        Console.WriteLine($"  {textItem.Text}");
                    }
                    else if (contentItem is MessageImageFileContent imageFileItem)
                    {
                        Console.WriteLine($"  <image from ID: {imageFileItem.FileId}>");
                    }
                }
                Console.WriteLine("----------------");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"\n❌ Error occurred: {ex.Message}");
            Console.WriteLine($"[DEBUG] Exception Type: {ex.GetType().FullName}");
            Console.WriteLine($"[DEBUG] Stack trace: {ex.StackTrace}");
            if (ex.InnerException != null)
            {
                Console.WriteLine($"[DEBUG] Inner Exception: {ex.InnerException.Message}");
                Console.WriteLine($"[DEBUG] Inner Exception Type: {ex.InnerException.GetType().FullName}");
                Console.WriteLine($"[DEBUG] Inner Exception Stack trace: {ex.InnerException.StackTrace}");
            }
            if (ex is Azure.RequestFailedException reqEx)
            {
                Console.WriteLine($"[DEBUG] Azure RequestFailedException Status: {reqEx.Status}");
                Console.WriteLine($"[DEBUG] Azure RequestFailedException ErrorCode: {reqEx.ErrorCode}");
            }
        }
        
        Console.WriteLine($"\nApplication completed at: {DateTime.Now:yyyy-MM-dd HH:mm:ss}");
    }
}

额外DNS测试结果 #

[DEBUG] .NET DNS test for eastus.api.azureml.ms

//connectionString System.Net.Dns.GetHostEntry() test:
[DEBUG] .NET DNS resolution failed: nodename nor servname provided, or not known

[DEBUG] .NET DNS test for vienna-eastus-ip-ingress-nginx-02.eastus.cloudapp.azure.com
[DEBUG] .NET DNS resolved: 48.211.42.162
[DEBUG] .NET DNS test for www.google.com
[DEBUG] .NET DNS resolved: 142.250.72.100

求助需求 #

请求排查该DNS解析失败问题，以成功连接Azure AI Foundry AgentsClient。

内容的提问来源于stack exchange，提问作者Belkaz