Very Strange Connection Time Out

May 25, 2004

I am sure I am using the same connection string for all connection.open, and closing all connections as soon as possible… but





When I try to debug my web app with vs, it runs for some time then I get:





The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached exception





However, if I just access the application normally form the url (not using vs.net) it runs flawlessly.





Has some one had the same problem? i can't debug help!!

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Strange Problem With Time Series Data On Time Series Chart

May 31, 2007

Hi, all experts here,



Thank you very much for your kind attention.



I encountered a very strange problem again. Why the time series displayed on the chart are so strange? The Key time column I chose for my time series algorithm is cal_month(e.g 199001...), but why the date displayed on the time series chart is like :05/06/2448? (it should be like 199001..?) What is that data? And where exactly did it come from? What is the exact cause of this?



Hope it is clear for your help.

I am really confused on this and thanks a lot for your kind advices and help and I am looking forward to hearing from you shortly.



With best regards,



Yours sincerely,

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Aug 30, 2005

To set up the problem, paste this into QA:if exists (select * from dbo.sysobjects where id =object_id(N'[dbo].[WorkOTRate]') and OBJECTPROPERTY(id, N'IsUserTable')= 1)drop table [dbo].[WorkOTRate]GOCREATE TABLE [dbo].[WorkOTRate] ([TimeFrom] [smalldatetime] NOT NULL ,[TimeTo] [smalldatetime] NOT NULL ,[RateMultiplier] [float] NOT NULL) ON [PRIMARY]GOINSERT INTO dbo.WorkOTRate (TimeFrom, TimeTo, RateMultiplier)VALUES ('18:00:00', '23:59:59', 1.2)SELECT TimeFrom, TimeTo, RateMultiplier FROM dbo.WorkOTRateThis gives the following result:1900-01-01 18:00:001900-01-02 00:00:001.2So, it's storing the time 23:59:59 as midnight. That's odd.(NOTE: If you rescript the table using datetime instead ofsmalldatetime types, the data are stored correctly.)It gets worse (or better, if you like perversity).If I go to Enterprise Manager, right-click on WorkOTRate and select"Open Table" -> "Return All Rows" I get:01/01/1900 18:00:0002/01/19001.2So, I bite the bullet and change the two column types to datetime,clear out the old data and run the INSERT again. The data looks betternow.Go back to the view in EM.If I put the cursor in a new row, and type into the TimeFrom column18:30:00 and the TimeTo column 19:30:00 and the RateMultiplier column1.3, and refresh the data by pressing the red shriek !, I get this:01/01/1900 18:00:0001/01/1900 23:59:591.218:30:0019:30:001.3If I re-run the SELECT from the QA, I get this:1900-01-01 18:00:00.0001900-01-01 23:59:59.0001.21899-12-30 18:30:00.0001899-12-30 19:30:00.0001.3Is it just me, or does this seem to be remarkably inconsistent?Edward

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Hi, all,

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* Strange SQL Server Connection Error *

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Hi guys,

We've been experiencing this strange error from our SQL server for about a month now and i've tried alot of things, visited alot of websites and manufactured a few possible solutions but nothing helps! Its very frustrating.
This is the error i get when i try and expand the server tree:

A connection could not be established to [OurServerName]

Reason: SQL Server does not exist or access denied.

ConnectionOpen (Connect())..

Please verify SQL Server is running and check your SQL Server registration properties by clicking on [OurServerName] node) and try again.

What really gets to me is that everything works after i restart the server. Then things will go fine for about a day or two and then the same thing again. This i causing alot of downtime for us. Can anyone please just give me a suggestion? :confused:

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Strange Remote Connection Problem

Feb 16, 2007

Vendor app (written in VB '05) connects fine building screens that list data from only one record but blows up building 'list' screens that list multiple records. Really strange-it works fine when run locally on the server (Win2K3) and when run from one developer's machine (which has VS 2005 but not SQLExpress) but not from other developer's machines (which have both VS 2005 & SQLExpress) nor from a 'user' machine (which has neither). All have .Net Frameworks 2.0, the developer machines have SQL Management Studio & connect fine via that.

Vendor, of course, says it's a configuration issue so not their problem. I'm trying to figure out what they could be doing differently when building a list screen & therefore why it would fail. Fact that it works locally suggests that the failure is in the remote connection-but fact that it connects on 'single record' screens says that remote connections work. So what would be different about a request to return multiple records and why would it work locally but not remotely?

BTW, Surface Area Configuration Manager won't run-it reports 'localhost does not exist on the network or it cannot be configured remotely'. This is when running the Configuration tool directly on the server.

Any ideas?

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Hi
I've got a database in SQL Server 2000 on Windows Server 2003 which appears to be okay from SQL Enterprise Manager and from SQL Query Analyser but which has a problem with one particular table when connected to from a VB DLL using ADO. The queries do either a select or an insert - the latter is via a stored procedure. Once the failure happens, any other queries generate a -2147217871[Microsoft][ODBC SQL Server Driver]Timeout expired.
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Jul 23, 2005

Hello,I developed a win32 .exe CGI that connects to a clustered SQLServer toreport some data.The software is written with Borland C++Builder.This is the oledb string:Name=Provider=SQLOLEDB;Password=xxx;Persist Security Info=True;UserID=xxxx;Data Source=xxxxx;Initial Catalog=xxxxx;NetworkLibrary=dbmssocnIt suddendly stopped working on my customer network, so I made sometest and I verivied that the problem is on the connection withSQLServer: my test program just opens a connection, closes it andexits, reporting in a log file if the open was successful or failed.If I run the program locally, just launching it, no problem, it works.I can run it mutilple time continuosly and is connects every time.If I run the program through my webserver, as a CGI that's how it issupposed to work (http:\localhostscriptsconnect.exe), it connectsthe first time, and then I have to wait 40 seconds to connect againsuccessfully, or it fails.If I try against MY sqlserver on my laptop or on my network no 40 secproblems, but on my customer network, with THEIR SQLServer , if I tryto connect from their webserver, or from my laptop webserver, I havethis 40sec problem.I analyzed the network traffic, and I discovered that when I run mytest program locally it originates only TCP/IP packets, and SQLServeranswers only with TCP/IP.But when I use it from the webserver as a CGI, it originates an UDPpacket, then SQL answers with another UDP packet, and then theycommunicate over TCP/IP.This when it works: the second time my program continues to send theUDP packet, but it receives no answer, and fails the communication.I can only say that:- we haven't touched the program for months, and it really stoppedworking suddendly, so I suspect that something in my customer netowrkhas changed- I tried many different OLEDB strings, disabling connection poolingand all the services, calling the SQLServer by name or IP...- the problem can't be related to my program, because now is reallyjust an oledb connection testAnyone have an idea?Thank you very much,Mattia

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Feb 28, 2008

Well this has got most of us stracthing our head as not matter what we do we can't connect remotely

But it get's a bit more complex. We have an existing web application running with a local instance of express running fine. However as the server is getting hammered we need to put the new version of the site on a second server. Unfortunately the key contact who use to work on the old system and set it up is no longer avialable. We've been through all the basics and nothing works... our latest attempt was to install a new instance of 2005 as we were not sure what was going on.

So, here is the log for this new clean instance:





Code Snippet

2008-02-28 15:12:13.75 spid5s Server name is 'S15271584SQLEXPRESS'. This is an informational message only. No user action is required.
2008-02-28 15:12:13.75 spid5s Starting up database 'msdb'.
2008-02-28 15:12:14.00 spid8s Clearing tempdb database.
2008-02-28 15:12:14.26 Server A self-generated certificate was successfully loaded for encryption.
2008-02-28 15:12:14.29 Server Server is listening on [ 'any' <ipv4> 4286].
2008-02-28 15:12:14.29 Server Server local connection provider is ready to accept connection on [ \.pipeSQLLocalSQLEXPRESS ].
2008-02-28 15:12:14.29 Server Server named pipe provider is ready to accept connection on [ \.pipeMSSQL$SQLEXPRESSsqlquery ].

The Browser is up and running and we try to connect via SQL Management Studio with the following details:

SERVERNAMESQLExpress
SQL Server Authentication

But get:





Code Snippet

TITLE: Connect to Server
------------------------------

Cannot connect to SERVERNAMESQLEXPRESS.

------------------------------
ADDITIONAL INFORMATION:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476

------------------------------
BUTTONS:

OK
------------------------------


How do I know this is not a connectivity/firewall issue? Simple:

1. We stop the SQLExpress instance
2. Setup netcat to listen on that port (nc -l -p 4286)
3. Connect via telnet (telnet SERVERNAME 4286) and type something which then appears printed out on the other end.

Anyway, the Windows Firewall is off and I can't see any other firewalls installed (we did not setup this server).

Btw, if we try and connect to the existing instance we get:





Code Snippet

TITLE: Connect to Server
------------------------------

Cannot connect to www.a-t-s.net.

------------------------------
ADDITIONAL INFORMATION:

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.) (Microsoft SQL Server, Error: 10060)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=10060&LinkId=20476

------------------------------
BUTTONS:

OK
------------------------------

Here is the error log for that instance:






Code Snippet

2008-02-15 06:43:16.92 spid4s Server name is 'SERVERNAMES15271584'. This is an informational message only. No user action is required.
2008-02-15 06:43:16.92 spid4s Starting up database 'msdb'.
2008-02-15 06:43:17.14 spid8s Clearing tempdb database.
2008-02-15 06:43:17.19 Server A self-generated certificate was successfully loaded for encryption.
2008-02-15 06:43:17.20 Server Server is listening on [ 'any' <ipv4> 1177].
2008-02-15 06:43:17.20 Server Server is listening on [ 'any' <ipv4> 1433].
2008-02-15 06:43:17.31 Server Server local connection provider is ready to accept connection on [ \.pipeSQLLocalS15271584 ].
2008-02-15 06:43:17.31 Server Server named pipe provider is ready to accept connection on [ \.pipeMSSQL$S15271584sqlquery ].
2008-02-15 06:43:17.31 Server Dedicated administrator connection support was not started because it is not available on this edition of SQL Server. This is an informational message only. No user action is required.
2008-02-15 06:43:17.33 Server The SQL Network Interface library could not register the Service Principal Name (SPN) for the SQL Server service. Error: 0x54b. Failure to register an SPN may cause integrated authentication to fall back to NTLM instead of Kerberos. This is an informational message. Further action is only required if Kerberos authentication is required by authentication policies.
2008-02-15 06:43:17.33 Server SQL Server is now ready for client connections. This is an informational message; no user action is required.


We've also run a network sniff with wireshark and get see the request hitting SQL on the right port... but there is never a response back.

Any ideas? I'm open to anything short of slitting my wrists!!


Many thanks in advanced.

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This wasn't any help:

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Hi,

Can someone help me on this

When I run simple select query "Select * from Aadata" it works but when I filter with date it doesn't work please see below error:



Error Source : .Net SqlClient data provider

Error Messge: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding



I fixed connection properties:



Connection timeout = 30000

Execution timeout = 30000



Thanks in advance



AA





AA

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May 22, 2007

Hi,

Can someone help me on this

When I run simple select query "Select * from Aadata" it works but when I filter with date it doesn't work please see below error:



Error Source : .Net SqlClient data provider

Error Messge: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding



I fixed connection properties:



Connection timeout = 30000

Execution timeout = 30000



Thanks in advance



AA





AA

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Hello, All!
Good Afternoon!

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Also came across this article.
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