IIS10 - MySQL Database Disconnection - An unhandled exception has occurred ( Event id 1309 )

Question

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Hi, I'm Getting the below error message and could not able the site. after restarting the IIS site gets reconnected.Please let me Know the Solution for the error.

Log Name: Application

Source: ASP.NET 2.0.50727.0

Date: 28-06-2019 10:55:30 AM

Event ID: 1309

Task Category: Web Event

Level: Warning

Keywords: Classic

User: N/A

Computer: PSPINTRANETSVR.root.com

Description:

Event code: 3005

Event message: An unhandled exception has occurred.

Event time: 28-06-2019 10:55:30

Event time (UTC): 28-06-2019 05:25:30

Event ID: c8f21b66d0f6484ea19410b52b9d4f50

Event sequence: 509

Event occurrence: 4

Event detail code: 0 Application information: Application domain: /LM/W3SVC/2/ROOT-1-132061709909075750 Trust level: Full Application Virtual Path: / Application Path: D:\\IIS\\PIMS WEBINTERFACE\\www\\ Machine name: PSPINTRANETSVR Process information: Process ID: 4736 Process name: w3wp.exe Account name: IIS APPPOOL\\WEBINTERFACE Exception information: Exception type: InvalidOperationException Exception message: Connection must be valid and open Request information: Request URL: http://site Request path: / User host address: 000.000.0.000 User:
Is authenticated: False Authentication Type:
Thread account name: IIS APPPOOL\\WEBINTERFACE Thread information: Thread ID: 9 Thread account name: IIS APPPOOL\\WEBINTERFACE Is impersonating: False Stack trace: at MySql.Data.MySqlClient.MySqlCommand.CheckState() at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() at _Application._application.get_department() in D:\\Working Folder\\Working Projects\\Application\\new\\Application\\Application\\database.cs:line 101 at Application.pims.Page_Load(Object sender, EventArgs e) in D:\\Working Folder\\Working Projects\\Application\\new\\Application\\Application\\pims.Master.cs:line 40 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessReque stMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) Custom event details:

Event Xml:
1309 3 3 0x80000000000000 4137 Application PSPINTRANETSVR.root.com 3005 An unhandled exception has occurred. 28-06-2019 10:55:30 28-06-2019 05:25:30 c8f21b66d0f6484ea19410b52b9d4f50 509 4 0 /LM/W3SVC/2/ROOT-1-132061709909075750 Full / D:\\IIS\\PIMS WEBINTERFACE\\www\\ PSPINTRANETSVR 4736 w3wp.exe IIS APPPOOL\\WEBINTERFACE InvalidOperationException Connection must be valid and open http://site/ /project_complete.aspx 192.168.0.000 False IIS APPPOOL\\WEBINTERFACE 9 IIS APPPOOL\\WEBINTERFACE False at MySql.Data.MySqlClient.MySqlCommand.CheckState() at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() at Application.application.get_department() in D:\\Working Folder\\Working Projects\\Application\\new_Application\\Application\\database.cs:line 101 at Application.pims.Page_Load(Object sender, EventArgs e) in D:\\Working Folder\\Working Projects\\Application\\new\\Application\\Application\\Master.cs:line 40 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHand lerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Answer 1

This Problem solved by increasing the value of max_connections in MySQL

1.Check how many users connected your Database

 show status like 'max_used_connections';

2.Check your default max connection range

show variables like 'max_connections';

3.Set the max connection value whatever you want but the max range is 100000

set global max_connections = 100000;