各位好

我目前在撰寫一個c#的排程
該排程會去發送post api

我在我本機window 10執行，api終端也是window 10
可以順利將所有post執行完成

我在伺服器ibm上執行，api終端是window 10
執行結果只會成功前2筆，第3筆之後就會timeout失敗

我聽我學長建議加間隔，避免太過密集的發post出去
於是我程式中間有加sleep 2秒，結果仍是相同

以下是我的程式碼與結果
還請版上的專家們幫我看看是什麼問題
(懷疑是linux的什麼設定所導致？但我不懂linux)

Dictionary<string, string>[] API_MAP = Enumerable.Range(0, 1).Select(_ => new Dictionary<string, string> {  
														{"uniform_no1", "https://url/api/receipt.php"},
														{"uniform_no2", "https://url/api/receipt.php"},
														{"uniform_no3", "https://url/api/receipt.php"},
														{"uniform_no4", "https://url/api/receipt.php"},
														{"uniform_no5", "https://url/api/receipt.php"} 
													 }).ToArray();
foreach (System.IO.FileInfo file in files)
{
	XmlDocument xdoc = new XmlDocument();
	XmlNode xRoot;
	XmlNodeList xInfoList;
	XmlNodeList xDetailList;

	xdoc.Load(file.FullName);
	xRoot = xdoc.DocumentElement;
	xInfoList = xRoot.ChildNodes;
	System.Data.DataTable dt = new System.Data.DataTable();
	xDetailList = xInfoList.Item(xInfoList.Count - 1).ChildNodes;

	for (int i = 0; i < dt.Rows.Count; i++)
	{
		System.Data.DataTable userDt = DBModule.SelectSQL(String.Format("SELECT * FROM table_users WHERE state = 1 AND uniform_number = '{0}'", dt.Rows[i]["ban"].ToString()));
		if (userDt.Rows.Count == 0)
		{
			foreach (Dictionary<string, string> dc in API_MAP)
			{
				if (dc.Count == 0) continue;
				foreach (KeyValuePair<string, string> kvp in dc)
				{
					if (dt.Rows[i]["ban"].ToString() == kvp.Key)
					{
						StringBuilder postDataSb = new StringBuilder();
						postDataSb.Append("act=").Append("act");
						postDataSb.Append("&uniform_no=").Append(kvp.Key);
						postDataSb.Append("&year_month=").Append(dt.Rows[i]["yearmonth"].ToString());
						postDataSb.Append("&track=").Append(dt.Rows[i]["invoicetrack"].ToString());
						postDataSb.Append("&begin_no=").Append(dt.Rows[i]["invoicebeginno"].ToString());
						postDataSb.Append("&end_no=").Append(dt.Rows[i]["invoiceendno"].ToString());

						string resultString = APIModule.httpPost(kvp.Value, postDataSb.ToString());
						Console.WriteLine("API POST URL：" + kvp.Value);
						Console.WriteLine("API POST DATA：" + postDataSb.ToString());
						Console.WriteLine("API POST 結果：" + resultString);
						Thread.Sleep(2000);

						if (resultString == "Ok")
						{
							Console.WriteLine("[" + DateTime.Now.ToString() + "] " + dt.Rows[i]["ban"].ToString() +
							   " 透過API新增發票本[" + dt.Rows[i]["invoicebeginno"].ToString() + " ~ " + dt.Rows[i]["invoiceendno"].ToString() + "]成功");
						}
						else
						{
							Console.WriteLine("[" + DateTime.Now.ToString() + "] " + dt.Rows[i]["ban"].ToString() +
								" 透過API新增發票本[" + dt.Rows[i]["invoicebeginno"].ToString() + " ~ " + dt.Rows[i]["invoiceendno"].ToString() + "]失敗");
						}
					}
				}
			}
		}
	}
}

public static string httpPost(String url, String postData, String auth = "")
{
    string result = "";
    try
    {
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(url));
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        if (auth != "")
        {
            request.Headers.Add("Authorization", auth);
        } 

        byte[] bs = System.Text.Encoding.UTF8.GetBytes(postData);
        request.ContentLength = bs.Length;
        request.GetRequestStream().Write(bs, 0, bs.Length);
        //取得 WebResponse 的物件 然後把回傳的資料讀出
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        StreamReader sr = new StreamReader(response.GetResponseStream());
        result = sr.ReadToEnd();
    }
    catch (Exception ex)
    {
        return ex.ToString();
    }
    return result;
}