關於IIS進程w3wp.exe自動回收和重啟問題

- 日理万妓 2022-02-02 00:41 397阅读 0赞

問題描述

1.線程被中斷,沒執行完

2.全局變量值和Session值丟失

IIS設置和w3wp.exe進程如下圖

1.關閉時間限制(秒) 90秒,閒置逾時20分鐘 意思大概是網頁請求閒置20分鐘后將在90秒之後自動關閉w3wp.exe進程

測試設定將 90改成30,20改成1

2.固定時間間隔 1740分鐘 大概29小時, 意思大概是w3wp.exe進程運行29小時后,會自動回收

測試設定將1740改成5

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xvc2VkZ3Vlc3Q_size_16_color_FFFFFF_t_70][]

![20190510114050557.png][]

測試案例

![2019051011500230.png][]

1.ajax請求執行線程(test按鈕)

a.點一次test按鈕 大概在2分鐘左右時w3wp.exe自動關閉了,Thread線程停止工作,沒有異常產生,且Session和全局變量SessionHelper.SessionHelper.TestStr值丟失

b.頻繁點擊test按鈕 大概在5分鐘左右時 w3wp.exe出現兩個即IIS自動回收生效,第一個w3wp.exe內存慢慢減少至消失,Thread線程停止工作,沒有異常產生,且Session和全局變量SessionHelper.SessionHelper.TestStr值丟失一次時

2.Ajax請求 長時間運行 (Sleep按鈕) 耗時4分鐘

a.開啟后立即點一次test按鈕 w3wp.exe在5分30秒后才消失,即直到Sleep返回后連接才被閒置

b.開啟后在w3wp.exe消失前點擊一次,在5分鐘左右時間時,w3wp.exe出現兩個即IIS自動回收生效,兩個w3wp.exe一直存在直到Sleep請求執行完畢時,第一個w3wp.exe才消失

結論:

1.IIS自動回收和自動關閉會將 多線程,全局變量,Session清空

2.耗時的請求會阻止IIS的自動回收和自動關閉

3.網頁在使用多線程,全局變量及Session時,要考慮使用的安全性,防止丟失造成網頁異常

主要測試代碼

JS代碼

//異步Ajax
        AjaxHelper.PostCallback = function (RequestControl, PostData,CallBack) {      
            $.ajax({
                type: "POST",
                url: RequestControl,
                data: PostData,          
                dataType: "jsonp",
                async: true,//異步
                success: function (result) {
                    CallBack(result);
                },
                error: function (xhr) {
                    if (xhr.status == "0" && (!(location.href.indexOf("localhost") > -1 || location.href.indexOf("log=Y") > -1))) {
                        return;
                    }
                    alert("PostCallback status:" + xhr.status + "statusText:" + xhr.statusText + "responseText:" + xhr.responseText);
                }
            });       
        }
    
      $("#test").click(function () {
          var pd = { action: "run"}
          AjaxHelper.PostCallback("handler/Handler.ashx", pd, function (a) {
              alert(a);
          });
      });
    $("#Sleep").click(function () {
        var pd = { action: "Sleep" }
        AjaxHelper.PostCallback("handler/Handler.ashx", pd, function (a) {
            alert(a);
        });
    });

Session操作類

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Web;
    using System.Web.SessionState;
    using WebPublic;
    
    namespace SessionHelper
    {
        public class SessionHelper : IRequiresSessionState
        {
            public static HttpSessionState MSession = HttpContext.Current.Session;
    
            public static void InitSesion(HttpSessionState _session)
            {
                if (SessionHelper.MSession != null)
                {
                    SessionHelper.MSession = _session;
                }
            }
            public static string TestStr;
            public static string GetSession(string key)
            {
                try
                {
                    return PubString.ToString(SessionHelper.MSession[key]);
                }
                catch (Exception ex)
                {
                    LogHelper.WriteLog("GetSession", "Err", ex);
                    throw ex;
                }
               
            }
    
            public static void SetSession(string key, string value)
            {
                try
                {
                    SessionHelper.MSession[key] = value;
                }
                catch (Exception ex)
                {
                    LogHelper.WriteLog("GetSession", "Err", ex);
                    throw ex;
                }
            }
        }
    }

public string TestRun()
        {
            try
            {
                string _str = SessionHelper.SessionHelper.GetSession("test");
                if (_str != "")
                {
                    SessionHelper.SessionHelper.SetSession("test", (int.Parse(_str) + 1).ToString());
                }
                else
                {
                    _str = "0";
                    SessionHelper.SessionHelper.SetSession("test", (int.Parse(_str) + 1).ToString());
                }
                SessionHelper.SessionHelper.TestStr = "值為null是,表明被清空";
                 Thread m_SplashThread = new Thread(new ThreadStart(delegate()
                 {
                     try
                     {
                         for (int i = 0; i < 60; i++)
                         {
                             Thread.Sleep(60000);//1分                         
                             SessionHelper.SessionHelper.SetSession("test-" + (int.Parse(_str) + 1) + "_" + i, "測試字符串----");
                             LogHelper.WriteLog("一分鐘斷線", SessionHelper.SessionHelper.TestStr, SessionHelper.SessionHelper.MSession.Count.ToString());
                         }
                         LogHelper.WriteLog("一分鐘斷線", SessionHelper.SessionHelper.TestStr, SessionHelper.SessionHelper.MSession.Count.ToString());
    
                     }
                     catch (Exception ex)
                     {                     
                        LogHelper.WriteLog("一分鐘斷線", "Err", ex);                    
                     }
                 }));
                 m_SplashThread.IsBackground = true;
                 m_SplashThread.SetApartmentState(ApartmentState.STA);
                 m_SplashThread.Start();             
                return _str;
            }
            catch (Exception ex)
            {
    
                LogHelper.WriteLog("TestRun", "Err", ex);
                throw ex;
            }
           
        }
    
        public string Sleep() { 
            //持續請求 2分
            try
            {
                string _str = SessionHelper.SessionHelper.GetSession("test");
                if (_str != "")
                {
                    SessionHelper.SessionHelper.SetSession("test", (int.Parse(_str) + 1).ToString());
                }
                else
                {
                    _str = "0";
                    SessionHelper.SessionHelper.SetSession("test", (int.Parse(_str) + 1).ToString());
                }
                //SessionHelper.SessionHelper.TestStr = "值為null是,表明被清空";
                Thread.Sleep(240000);//持續請求 4分
                LogHelper.WriteLog("TestRun", SessionHelper.SessionHelper.TestStr, _str);
                return SessionHelper.SessionHelper.TestStr;
            }
            catch (Exception ex)
            {
    
                LogHelper.WriteLog("TestRun", "Err", ex);
                throw ex;
            }
        }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xvc2VkZ3Vlc3Q_size_16_color_FFFFFF_t_70]: /images/20220202/0cd5b8611a2c4791988c848e0301666d.png
[20190510114050557.png]: /images/20220202/3500647170da437583efd871b9359385.png
[2019051011500230.png]: /images/20220202/f61a4003011d476c9bcaa818363c2f18.png