Sql Exception With .net 4 & EF

Question

we are using .net 4 MVC2 with EF & Sql Server 2005.

For some requests, and it happens rarely, and only when we are doing search which is implemented with classes mapped to stored procedures performing full text search, we get the exception:

[SqlException (0x80131904): Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +2030802
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +5009584
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +234
   System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2275
   System.Data.SqlClient.SqlDataReader.ConsumeMetaData() +33
   System.Data.SqlClient.SqlDataReader.get_MetaData() +86
   System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +311
   System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +987
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +162
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +32
   System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +141
   System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +12
   System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +10
   System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +443

[EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details.]
   System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +479
   System.Data.Objects.ObjectContext.CreateFunctionObjectResult(EntityCommand entityCommand, EntitySet entitySet, EdmType edmType, MergeOption mergeOption) +182
   System.Data.Objects.ObjectContext.ExecuteFunction(String functionName, MergeOption mergeOption, ObjectParameter[] parameters) +218
   System.Data.Objects.ObjectContext.ExecuteFunction(String functionName, ObjectParameter[] parameters) +53

If the search is retried after the error occurs (with same or different term), it works regularly.

Any suggestions well appreciated

Thanks

--MB

THOUGHT 1: The exception seems to happen after the connection to sql server is made, and while the stored procedure is being executed, am I correct? If this is the case, then I would need to extend the query execution timeout and not the connection timeout? Is this possible, where?

THOUGHT 2: Perhaps I am wrong and this could be a stale connection in the pool? In Java world you can pass the sql that is executed on the connection before the app obtains it to make sure the connection is opened and working? Could that be causing this. I have not been able to locate such an option within http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.connectionstring.aspx

THOUGHT 3: I'm lost :)

Answer 1

You can try setting the ObjectContext.CommandTimeout property:

Gets or sets the timeout value, in seconds, for all object context operations. A null value indicates that the default value of the underlying provider will be used.