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dotnet ado.net : Randomly get timeout on SqlClient hitting localhost
I get this error randomly on both my home and work computer. I'm hitting Sql Server 2000 dev version on localhost. This happens on both my home and work computer. Here's the exception: System.Data.SqlClient.SqlException occurred Message="Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding." Source=".Net SqlClient Data Provider" ErrorCode=-2146232060 Class=11 LineNumber=0 Number=-2 Procedure="" Server="localhost" State=0 StackTrace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader() at net.windward.datasource.ado.AdoDataSource.executeQuery(IDbConnection conn, String select) in C:\src\kahuna\DotNetEngine\WindwardReports\net\windward\datasource\ado\AdoDataSource.jsl:line 1852 -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm
That's what is so strange about this - it is all on one machine. And this is
not a web app, it a Forms app. So there isn't much to go wrong at the communications layer. The other thing I just realized - it times-out fast. In under a second. So there is some reason that it decides it is a timeout other than taking a long time trying to connect. -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm [quoted text, click to view] "Steven Cheng[MSFT]" wrote:
> Hi Dave, > > From your description, you're getting some timeout exception in your > application randomly, correct? > > It seems your ADO.NET code will meet connection unusable condition > randomly. Have you checked the server-side to see whether there is anything > abnormal sometimes? Since the code works mostly and if the code logic is > not quite complex, I think client-side should be ok. > > Sincerely, > > Steven Cheng > > Microsoft MSDN Online Support Lead > > > This posting is provided "AS IS" with no warranties, and confers no rights. >
Hi Dave,
From your description, you're getting some timeout exception in your application randomly, correct? It seems your ADO.NET code will meet connection unusable condition randomly. Have you checked the server-side to see whether there is anything abnormal sometimes? Since the code works mostly and if the code logic is not quite complex, I think client-side should be ok. Sincerely, Steven Cheng Microsoft MSDN Online Support Lead This posting is provided "AS IS" with no warranties, and confers no rights.
I do. I get this problem on both my work and home computer. In both cases
they are connecting to a local copy of Sql Server 2000 dev version. -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm [quoted text, click to view] "Steven Cheng[MSFT]" wrote:
> Thanks for your reply Dave, > > Since it is a client form application, I think the problem should not be > caused by performance stress. If possible, you can try connecting to > different database to see whether you'll encounter the same error. > > Sincerely, > > Steven Cheng > > Microsoft MSDN Online Support Lead > > > This posting is provided "AS IS" with no warranties, and confers no rights. >
Okay, the timeouts can occur on any system. There are (generally) two types
of timeouts that occur : Connection timeouts and Command timeouts. The former can be caused by a connection pool issue or by the server (or system) being too busy to process the query. The latter can be caused by a lock conflict or (again) the server being too busy to complete the operation in time. Just because it's a client system does not mean that there aren't other competing applications fighting for CPU time--like Age Of Empires. ;) -- ____________________________________ William (Bill) Vaughn Author, Mentor, Consultant Microsoft MVP INETA Speaker www.betav.com/blog/billva www.betav.com Please reply only to the newsgroup so that others can benefit. This posting is provided "AS IS" with no warranties, and confers no rights. __________________________________ Visit www.hitchhikerguides.net to get more information on my latest book: Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) ----------------------------------------------------------------------------------------------------------------------- [quoted text, click to view] "Steven Cheng[MSFT]" <stcheng@online.microsoft.com> wrote in message news:41lr$RwwHHA.4484@TK2MSFTNGHUB02.phx.gbl... > Thanks for your reply Dave, > > Since it is a client form application, I think the problem should not be > caused by performance stress. If possible, you can try connecting to > different database to see whether you'll encounter the same error. > > Sincerely, > > Steven Cheng > > Microsoft MSDN Online Support Lead > > > This posting is provided "AS IS" with no warranties, and confers no > rights. >
I think (going on memory here) that it only happens when I am running under
the debugger. Could that cause some kind of lockout? It happens fast. It's not that a couple of seconds goes by and then it returns this error - it's in under a second. So I don't think it's a true timeout. Age of Empires - love that game. Haven't played in awhile though. Enemy Nations rocks too. -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm [quoted text, click to view] "William (Bill) Vaughn" wrote:
> Okay, the timeouts can occur on any system. There are (generally) two types > of timeouts that occur : Connection timeouts and Command timeouts. The > former can be caused by a connection pool issue or by the server (or system) > being too busy to process the query. The latter can be caused by a lock > conflict or (again) the server being too busy to complete the operation in > time. Just because it's a client system does not mean that there aren't > other competing applications fighting for CPU time--like Age Of Empires. ;) > > -- > ____________________________________ > William (Bill) Vaughn > Author, Mentor, Consultant > Microsoft MVP > INETA Speaker > www.betav.com/blog/billva > www.betav.com > Please reply only to the newsgroup so that others can benefit. > This posting is provided "AS IS" with no warranties, and confers no rights. > __________________________________ > Visit www.hitchhikerguides.net to get more information on my latest book: > Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) > and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) > ----------------------------------------------------------------------------------------------------------------------- > > "Steven Cheng[MSFT]" <stcheng@online.microsoft.com> wrote in message > news:41lr$RwwHHA.4484@TK2MSFTNGHUB02.phx.gbl... > > Thanks for your reply Dave, > > > > Since it is a client form application, I think the problem should not be > > caused by performance stress. If possible, you can try connecting to > > different database to see whether you'll encounter the same error. > > > > Sincerely, > > > > Steven Cheng > > > > Microsoft MSDN Online Support Lead > > > > > > This posting is provided "AS IS" with no warranties, and confers no > > rights. > > > >
Ah, the SQL Server debugger STOPS the service when you hit the breakpoint...
;) Could that be an issue for other developers? -- ____________________________________ William (Bill) Vaughn Author, Mentor, Consultant Microsoft MVP INETA Speaker www.betav.com/blog/billva www.betav.com Please reply only to the newsgroup so that others can benefit. This posting is provided "AS IS" with no warranties, and confers no rights. __________________________________ Visit www.hitchhikerguides.net to get more information on my latest book: Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) ----------------------------------------------------------------------------------------------------------------------- [quoted text, click to view] "David Thielen" <thielen@nospam.nospam> wrote in message news:ED1A6C22-3347-4F18-8DDB-E4E89CDB0296@microsoft.com... >I think (going on memory here) that it only happens when I am running under > the debugger. Could that cause some kind of lockout? > > It happens fast. It's not that a couple of seconds goes by and then it > returns this error - it's in under a second. So I don't think it's a true > timeout. > > Age of Empires - love that game. Haven't played in awhile though. Enemy > Nations rocks too. > > -- > thanks - dave > david_at_windward_dot_net > http://www.windwardreports.com > > Cubicle Wars - http://www.windwardreports.com/film.htm > > > > > "William (Bill) Vaughn" wrote: > >> Okay, the timeouts can occur on any system. There are (generally) two >> types >> of timeouts that occur : Connection timeouts and Command timeouts. The >> former can be caused by a connection pool issue or by the server (or >> system) >> being too busy to process the query. The latter can be caused by a lock >> conflict or (again) the server being too busy to complete the operation >> in >> time. Just because it's a client system does not mean that there aren't >> other competing applications fighting for CPU time--like Age Of Empires. >> ;) >> >> -- >> ____________________________________ >> William (Bill) Vaughn >> Author, Mentor, Consultant >> Microsoft MVP >> INETA Speaker >> www.betav.com/blog/billva >> www.betav.com >> Please reply only to the newsgroup so that others can benefit. >> This posting is provided "AS IS" with no warranties, and confers no >> rights. >> __________________________________ >> Visit www.hitchhikerguides.net to get more information on my latest book: >> Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) >> and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) >> ----------------------------------------------------------------------------------------------------------------------- >> >> "Steven Cheng[MSFT]" <stcheng@online.microsoft.com> wrote in message >> news:41lr$RwwHHA.4484@TK2MSFTNGHUB02.phx.gbl... >> > Thanks for your reply Dave, >> > >> > Since it is a client form application, I think the problem should not >> > be >> > caused by performance stress. If possible, you can try connecting to >> > different database to see whether you'll encounter the same error. >> > >> > Sincerely, >> > >> > Steven Cheng >> > >> > Microsoft MSDN Online Support Lead >> > >> > >> > This posting is provided "AS IS" with no warranties, and confers no >> > rights. >> > >> >> >>
Or is that the CLR debugger... ;(
CLR Debugger. Yes, but in debug mode you are interfering with the service process... it could be the issue. -- ____________________________________ William (Bill) Vaughn Author, Mentor, Consultant Microsoft MVP INETA Speaker www.betav.com/blog/billva www.betav.com Please reply only to the newsgroup so that others can benefit. This posting is provided "AS IS" with no warranties, and confers no rights. __________________________________ Visit www.hitchhikerguides.net to get more information on my latest book: Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) ----------------------------------------------------------------------------------------------------------------------- [quoted text, click to view] "William (Bill) Vaughn" <billvaRemoveThis@betav.com> wrote in message news:O54QVLywHHA.4800@TK2MSFTNGP05.phx.gbl... > Ah, the SQL Server debugger STOPS the service when you hit the > breakpoint... ;) Could that be an issue for other developers? > > -- > ____________________________________ > William (Bill) Vaughn > Author, Mentor, Consultant > Microsoft MVP > INETA Speaker > www.betav.com/blog/billva > www.betav.com > Please reply only to the newsgroup so that others can benefit. > This posting is provided "AS IS" with no warranties, and confers no > rights. > __________________________________ > Visit www.hitchhikerguides.net to get more information on my latest book: > Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) > and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) > ----------------------------------------------------------------------------------------------------------------------- > > "David Thielen" <thielen@nospam.nospam> wrote in message > news:ED1A6C22-3347-4F18-8DDB-E4E89CDB0296@microsoft.com... >>I think (going on memory here) that it only happens when I am running >>under >> the debugger. Could that cause some kind of lockout? >> >> It happens fast. It's not that a couple of seconds goes by and then it >> returns this error - it's in under a second. So I don't think it's a true >> timeout. >> >> Age of Empires - love that game. Haven't played in awhile though. Enemy >> Nations rocks too. >> >> -- >> thanks - dave >> david_at_windward_dot_net >> http://www.windwardreports.com >> >> Cubicle Wars - http://www.windwardreports.com/film.htm >> >> >> >> >> "William (Bill) Vaughn" wrote: >> >>> Okay, the timeouts can occur on any system. There are (generally) two >>> types >>> of timeouts that occur : Connection timeouts and Command timeouts. The >>> former can be caused by a connection pool issue or by the server (or >>> system) >>> being too busy to process the query. The latter can be caused by a lock >>> conflict or (again) the server being too busy to complete the operation >>> in >>> time. Just because it's a client system does not mean that there aren't >>> other competing applications fighting for CPU time--like Age Of Empires. >>> ;) >>> >>> -- >>> ____________________________________ >>> William (Bill) Vaughn >>> Author, Mentor, Consultant >>> Microsoft MVP >>> INETA Speaker >>> www.betav.com/blog/billva >>> www.betav.com >>> Please reply only to the newsgroup so that others can benefit. >>> This posting is provided "AS IS" with no warranties, and confers no >>> rights. >>> __________________________________ >>> Visit www.hitchhikerguides.net to get more information on my latest >>> book: >>> Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) >>> and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) >>> ----------------------------------------------------------------------------------------------------------------------- >>> >>> "Steven Cheng[MSFT]" <stcheng@online.microsoft.com> wrote in message >>> news:41lr$RwwHHA.4484@TK2MSFTNGHUB02.phx.gbl... >>> > Thanks for your reply Dave, >>> > >>> > Since it is a client form application, I think the problem should not >>> > be >>> > caused by performance stress. If possible, you can try connecting to >>> > different database to see whether you'll encounter the same error. >>> > >>> > Sincerely, >>> > >>> > Steven Cheng >>> > >>> > Microsoft MSDN Online Support Lead >>> > >>> > >>> > This posting is provided "AS IS" with no warranties, and confers no >>> > rights. >>> > >>> >>> >>> > >
Thanks for your reply Dave,
Since it is a client form application, I think the problem should not be caused by performance stress. If possible, you can try connecting to different database to see whether you'll encounter the same error. Sincerely, Steven Cheng Microsoft MSDN Online Support Lead This posting is provided "AS IS" with no warranties, and confers no rights.
Do you know if the debugger can cause this behavior?
-- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm [quoted text, click to view] "Steven Cheng[MSFT]" wrote:
> Hi Dave, > > Have you got any progress on this? If there is anything else we can help, > please feel free to post here. > > Sincerely, > > Steven Cheng > > Microsoft MSDN Online Support Lead > > > This posting is provided "AS IS" with no warranties, and confers no rights. >
Thanks for your reply Dave,
So far I haven't found any definite record on ADO.NET 2.0's connection timeout behavior under debugging mode, I've found one kb article mentioned the behavior for VS 2003/.NET 1.1. #You may receive the "Connection timeout" error message when you use SQL debugging in Visual Studio .NET 2003 http://support.microsoft.com/?id=905853 And some former threads/cases does mentioend similar behavior, but haven't conclude to a common definte cause. Sincerely, Steven Cheng Microsoft MSDN Online Support Lead This posting is provided "AS IS" with no warranties, and confers no rights.
Hi Dave,
Have you got any progress on this? If there is anything else we can help, please feel free to post here. Sincerely, Steven Cheng Microsoft MSDN Online Support Lead This posting is provided "AS IS" with no warranties, and confers no rights.
I have seen situations where the ConnectionTimeout value is exceeded when
pausing during some debug operations--but only on the system where the debugging is occurring. -- ____________________________________ William (Bill) Vaughn Author, Mentor, Consultant Microsoft MVP INETA Speaker www.betav.com/blog/billva www.betav.com Please reply only to the newsgroup so that others can benefit. This posting is provided "AS IS" with no warranties, and confers no rights. __________________________________ Visit www.hitchhikerguides.net to get more information on my latest book: Hitchhiker's Guide to Visual Studio and SQL Server (7th Edition) and Hitchhiker's Guide to SQL Server 2005 Compact Edition (EBook) ----------------------------------------------------------------------------------------------------------------------- [quoted text, click to view] "David Thielen" <thielen@nospam.nospam> wrote in message
news:4BE6E40D-EB32-432D-9D52-2B93EEB97676@microsoft.com... > Do you know if the debugger can cause this behavior? > > -- > thanks - dave > david_at_windward_dot_net > http://www.windwardreports.com > > Cubicle Wars - http://www.windwardreports.com/film.htm > > > > > "Steven Cheng[MSFT]" wrote: > >> Hi Dave, >> >> Have you got any progress on this? If there is anything else we can help, >> please feel free to post here. >> >> Sincerely, >> >> Steven Cheng >> >> Microsoft MSDN Online Support Lead >> >> >> This posting is provided "AS IS" with no warranties, and confers no >> rights. >> >>
Hi I am using this below code to convert rtf templete to Pdf Report using XML data source. Its working fine. But I dont know how to do the same using SQL datasource. Pls help me out in this Thanks, Giri. import net.windward.xmlreport.*; import net.windward.datasource.dom4j.*; import java.io.*; public class SimpleReport { public static void main(String[] args) throws Exception { System.out.println("Template file: " + args[0]); System.out.println("Report file: " + args[1]); //System.out.println("Data file: " + args[2]); // create the report object, giving it the template and output streams ProcessPdfAPI report = new ProcessPdf(new FileInputStream(args[0]), new FileOutputStream(args[1])); // initialize the report object report.processSetup(); // apply a datasource to the template. This can be called multiple // times, passing in numerous datasources. report.processData(new Dom4jDataSource(new FileInputStream(args[2])), null); // create the output report. report.processComplete(); System.out.println("Report creation successful!"); } }
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