since 3 days, my website goes down frequently (several times a day) and couldn't figure out what is the source of this problem. Can anyone read the below log and see if there is anything might indicate where this failure comes from :   

 

Event code: 3005

Event message: An unhandled exception has occurred.

Event time: 1/8/2018 3:47:15 PM

Event time (UTC): 1/8/2018 12:47:15 PM

Event ID: 3ee59809ff49485498e085af0343cf23

Event sequence: 31

Event occurrence: 30

Event detail code: 0

 

Application information:

    Application domain: /LM/W3SVC/3/ROOT-1-131598891588436033

    Trust level: Full

    Application Virtual Path: /

    Application Path: D:\External\

    Machine name: WEBAPPSVR

 

Process information:

    Process ID: 3392

    Process name: w3wp.exe

    Account name: NT AUTHORITY\NETWORK SERVICE

 

Exception information:

    Exception type: SqlException

    Exception message: Connection Timeout Expired.  The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement.  This could be because the pre-login handshake failed or the server was unable to respond back in time.  The duration spent while attempting to connect to this server was - [Pre-Login] initialization=3; handshake=14994;

   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)

   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)

   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)

   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)

   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)

   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)

  at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)

   at System.Data.SqlClient.SqlConnection.Open()

   at PetaPoco.Database.OpenSharedConnection()

   at DotNetNuke.Data.PetaPoco.PetaPocoExt.ExecuteReader(Database database, String sql, Object[] args)

   at DotNetNuke.Data.PetaPoco.PetaPocoHelper.ExecuteReader(String connectionString, CommandType type, Int32 timeout, String sql, Object[] args)

   at DotNetNuke.Data.PetaPoco.PetaPocoHelper.ExecuteReader(String connectionString, CommandType type, String sql, Object[] args)

   at DnnSharp.Common.Orm.ActiveTable.Table.GetAllByProperty[T](QuerySession session, String orderBy, Nullable`1 top, IRestriction[] criteria)

 

The wait operation timed out

 

 

 

Request information:

    Request URL: https://www.kkesh.med.sa:443/ar-sa/Patients-and-Visitors/Getting-Here/patients-and-visitors/For-Vistors/patients-and-visitors/For-Vistors/Security-and-Policies

    Request path: /ar-sa/Patients-and-Visitors/Getting-Here/patients-and-visitors/For-Vistors/patients-and-visitors/For-Vistors/Security-and-Policies

    User host address: 157.55.39.30

    User: 

    Is authenticated: False

    Authentication Type: 

    Thread account name: NT AUTHORITY\NETWORK SERVICE

 

Thread information:

    Thread ID: 21

    Thread account name: NT AUTHORITY\NETWORK SERVICE

    Is impersonating: False

    Stack trace:    at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)

   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)

   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)

   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)

   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)

   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)

   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)

   at System.Data.SqlClient.SqlConnection.Open()

   at PetaPoco.Database.OpenSharedConnection()

   at DotNetNuke.Data.PetaPoco.PetaPocoExt.ExecuteReader(Database database, String sql, Object[] args)

   at DotNetNuke.Data.PetaPoco.PetaPocoHelper.ExecuteReader(String connectionString, CommandType type, Int32 timeout, String sql, Object[] args)

   at DotNetNuke.Data.PetaPoco.PetaPocoHelper.ExecuteReader(String connectionString, CommandType type, String sql, Object[] args)

   at DnnSharp.Common.Orm.ActiveTable.Table.GetAllByProperty[T](QuerySession session, String orderBy, Nullable`1 top, IRestriction[] criteria)

 

 

 

thank you.