I've fixed this issue by placing the firebird client dlls in C:\Windows\Microsoft.NET\Framework\v2.0.50727 so that Visual Studio can see them. John
-----Original Message----- From: firebird-net-provider-requ...@lists.sourceforge.net [mailto:firebird-net-provider-requ...@lists.sourceforge.net] Sent: Monday, February 08, 2010 8:22 AM To: firebird-net-provider@lists.sourceforge.net Subject: Firebird-net-provider Digest, Vol 46, Issue 5 Send Firebird-net-provider mailing list submissions to firebird-net-provider@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/firebird-net-provider or, via email, send a message with subject or body 'help' to firebird-net-provider-requ...@lists.sourceforge.net You can reach the person managing the list at firebird-net-provider-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than "Re: Contents of Firebird-net-provider digest..." Today's Topics: 1. [FB-Tracker] Created: (DNET-293) Do not use Process.GetCurrentProcess() to get calling executable (Valeriy (JIRA)) 2. How do I generate an EDMX file with Firebird Embedded? (Rick) 3. [FB-Tracker] Created: (DNET-294) An exception was thrown by the type initializer for FirebirdSql.Data.Common.Charset (Daniel Junges (JIRA)) 4. Re: How do I generate an EDMX file with Firebird Embedded? (Jiri Cincura) 5. [FB-Tracker] Created: (DNET-295) Correction for Firebird ForeignKeyCoumns schema (Jiri Cincura (JIRA)) 6. FW: connection pooling in a multithreading environment (Bruce Tiffany) ---------------------------------------------------------------------- Message: 1 Date: Fri, 5 Feb 2010 21:55:31 +0000 (GMT+00:00) From: "Valeriy (JIRA)" <trac...@firebirdsql.org> Subject: [Firebird-net-provider] [FB-Tracker] Created: (DNET-293) Do not use Process.GetCurrentProcess() to get calling executable To: firebird-net-provider@lists.sourceforge.net Message-ID: <795547696.11001265406932990.javamail.tom...@tracker.firebirdsql.org> Content-Type: text/plain; charset=UTF-8 Do not use Process.GetCurrentProcess() to get calling executable ---------------------------------------------------------------- Key: DNET-293 URL: http://tracker.firebirdsql.org/browse/DNET-293 Project: .NET Data provider Issue Type: Improvement Affects Versions: 2.5.1 Environment: Windows XP SP3, Kaspersky Internet Security 2009 Reporter: Valeriy Assignee: Jiri Cincura Priority: Blocker In FbConnectionInternal.cs at line 548 DO NOT use "Process.GetCurrentProcess().MainModule.FileName" to determine calling executable. Instead of this please use "Assembly.GetEntryAssembly().Location" because call to Process.GetCurrentProcess() demands application to increase they privileges to "Debug privileges" (that we don't need at all). By calling "Assembly.GetEntryAssembly().Location" we will get the same process string as call to "Process.GetCurrentProcess().MainModule.FileName" but without requesting debug privileges. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tracker.firebirdsql.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------ Message: 2 Date: Sat, 6 Feb 2010 22:31:29 -0800 From: "Rick" <rick__...@hotmail.com> Subject: [Firebird-net-provider] How do I generate an EDMX file with Firebird Embedded? To: <firebird-net-provider@lists.sourceforge.net> Message-ID: <bay117-ds4769428e4faf58b101b93a8...@phx.gbl> Content-Type: text/plain; charset="iso-8859-1" Hello, Win7 Pro 64bit How do I generate an EDMX file (for the Entity Framework - inside of VS2008) geared toward an app that uses the Firebird Embedded version? Going through the steps of adding a new ADO.net Entity Model (within VS2008) I don't see a Firebird provider for a connection when I get to that point of connecting to the Embedded database (VS default GUI for listing available providers for databases when trying to connect to a database). I have tried adding the Firebird.Net Provider v2.5.1 version of the FirebirdSql.Data.FirebirdClient.dll into the GAC etc. but that doesn't have any effect. I have tried installing the DDEX Provider 2.0.4, but that really didn't take (the GUI comes up transparent on the form like its not enabled). Thanks -------------- next part -------------- An HTML attachment was scrubbed... ------------------------------ Message: 3 Date: Sun, 7 Feb 2010 12:14:25 +0000 (GMT+00:00) From: "Daniel Junges (JIRA)" <trac...@firebirdsql.org> Subject: [Firebird-net-provider] [FB-Tracker] Created: (DNET-294) An exception was thrown by the type initializer for FirebirdSql.Data.Common.Charset To: firebird-net-provider@lists.sourceforge.net Message-ID: <794053170.11191265544865107.javamail.tom...@tracker.firebirdsql.org> Content-Type: text/plain; charset=UTF-8 An exception was thrown by the type initializer for FirebirdSql.Data.Common.Charset ------------------------------------------------------------------------ ----------- Key: DNET-294 URL: http://tracker.firebirdsql.org/browse/DNET-294 Project: .NET Data provider Issue Type: Bug Components: ADO.NET Provider Environment: Suse Linux, Mono 2.6.1, ASP.NET Reporter: Daniel Junges Assignee: Jiri Cincura Priority: Blocker We are developing an solution in asp.net and using the Firebird .NET Provider. I have searched a lot on google, have downloaded the lstes version from svn and added the solution: http://firebird.svn.sourceforge.net/viewvc/firebird/NETProvider/tags/NET Provider_2.5.1/source/FirebirdSql/Data/ with the symbols: TRACE;MONO;LINUX and i still get the follow exeption An exception was thrown by the type initializer for FirebirdSql.Data.Common.Charset at ...OpenMyDBConnection () [0x00000] in <filename unknown>:0 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tracker.firebirdsql.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------ Message: 4 Date: Sun, 7 Feb 2010 13:33:07 +0100 From: Jiri Cincura <disk...@cincura.net> Subject: Re: [Firebird-net-provider] How do I generate an EDMX file with Firebird Embedded? To: "For users and developers of the Firebird .NET providers" <firebird-net-provider@lists.sourceforge.net> Message-ID: <d2fa8bfb1002070433i346ebedcr4d4efb17c7b89...@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 On Sun, Feb 7, 2010 at 07:31, Rick <rick__...@hotmail.com> wrote: > How do I generate an EDMX file (for the Entity Framework - inside of VS2008) > geared toward an app that uses the Firebird Embedded version? Same way as for "big" server. > I have tried installing the DDEX Provider 2.0.4, but that really didn't take > (the GUI comes up transparent on the form like its not enabled). You need to add DDEX. If didn't see FB provider in list, read the readme again. -- Jiri {x2} Cincura (CTO x2develop.com) http://blog.cincura.net/ | http://www.ID3renamer.com ------------------------------ Message: 5 Date: Mon, 8 Feb 2010 13:12:24 +0000 (GMT+00:00) From: "Jiri Cincura (JIRA)" <trac...@firebirdsql.org> Subject: [Firebird-net-provider] [FB-Tracker] Created: (DNET-295) Correction for Firebird ForeignKeyCoumns schema To: firebird-net-provider@lists.sourceforge.net Message-ID: <1898401261.11391265634744472.javamail.tom...@tracker.firebirdsql.org> Content-Type: text/plain; charset=UTF-8 Correction for Firebird ForeignKeyCoumns schema ----------------------------------------------- Key: DNET-295 URL: http://tracker.firebirdsql.org/browse/DNET-295 Project: .NET Data provider Issue Type: Bug Components: ADO.NET Provider Affects Versions: 2.5.1 Reporter: Jiri Cincura Assignee: Jiri Cincura Priority: Minor Attachments: DatabaseCreation.sql Reported to me, privately by Van Den Berghe, Vincent. === I have been thinking about a way to illustrate the bug, such that the method might be included in a future test. After some thinking, I came up with the function below: public void CheckForeignKey(FbConnection connection) { foreach (DataRow row in connection.GetSchema("ForeignKeys").Rows) { var constraintName = (string)row["CONSTRAINT_NAME"]; var tableName = (string)row["TABLE_NAME"]; var referencedTableName = (string)row["REFERENCED_TABLE_NAME"]; #if true // this fails: foreach (DataRow pr in connection.GetSchema("ForeignKeyColumns", new string[] { null, null, tableName, constraintName }).Rows) { Debug.Assert(constraintName == (string)pr["CONSTRAINT_NAME"]); Debug.Assert(tableName == (string)pr["TABLE_NAME"]); Debug.Assert(referencedTableName == (string)pr["REFERENCED_TABLE_NAME"]); } #else // use this instead of connection.GetSchema("ForeignKeyColumns") until the bug has been corrected string commandText = @" SELECT null AS CONSTRAINT_CATALOG,null AS CONSTRAINT_SCHEMA,co.rdb$constraint_name AS CONSTRAINT_NAME, null AS TABLE_CATALOG,null AS TABLE_SCHEMA,co.rdb$relation_name AS TABLE_NAME, coidxseg.rdb$field_name AS COLUMN_NAME, null as REFERENCED_TABLE_CATALOG,null as REFERENCED_TABLE_SCHEMA,refco.rdb$relation_name AS REFERENCED_TABLE_NAME, refidxseg.rdb$field_name AS REFERENCED_COLUMN_NAME, coidxseg.rdb$field_position AS ORDINAL_POSITION FROM rdb$ref_constraints ref INNER JOIN rdb$relation_constraints co ON ref.rdb$constraint_name=co.rdb$constraint_name INNER JOIN rdb$index_segments coidxseg ON co.rdb$index_name=coidxseg.rdb$index_name INNER JOIN rdb$relation_constraints refco ON ref.rdb$const_name_uq=refco.rdb$constraint_name INNER JOIN rdb$index_segments refidxseg ON refco.rdb$index_name=refidxseg.rdb$index_name AND coidxseg.rdb$field_position=refidxseg.rdb$field_position WHERE co.rdb$relation_na...@p0 AND co.rdb$constraint_na...@p1 ORDER BY ref.rdb$constraint_name,coidxseg.rdb$field_position" ; // AND coidxseg.rdb$field_name = @p3", using (var cmd = connection.CreateCommand()) { cmd.CommandText = commandText; cmd.Parameters.Add( "@p0", FbDbType.Char, 31).Value = tableName; cmd.Parameters.Add( "@p1", FbDbType.Char, 31).Value = constraintName; //cmd.Parameters.Add("@p3", FbDbType.Char, 31).Value = fieldName; using (var reader = cmd.ExecuteReader()) while (reader.Read()) { Debug.Assert(constraintName == reader.GetString(2 /*"CONSTRAINT_NAME"*/).TrimEnd()); Debug.Assert(tableName == reader.GetString(5 /*"TABLE_NAME"*/).TrimEnd()); Debug.Assert(referencedTableName == reader.GetString(9/*"REFERENCED_TABLE_NAME"*/).TrimEnd()); } } #endif } } This function will just loop through all foreign key definition, get the columns and perform some simple checks on the latter (the constraint name, table name and referenced table name must all match). Executed as such, the function will fail, because of the bug in ForeignKeyColumns. If you change the #if true to #if false, and use the corrected (and compatible) query, the function will succeed. You can try it on the database model included in this e-mail (DatabaseCreation.sql). -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tracker.firebirdsql.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------ Message: 6 Date: Mon, 8 Feb 2010 08:21:41 -0500 From: "Bruce Tiffany" <btiff...@pbs.org> Subject: [Firebird-net-provider] FW: connection pooling in a multithreading environment To: <firebird-net-provider@lists.sourceforge.net> Message-ID: <fd240fabfa66b14aab4b2bcf4a004e9f03548...@excl.hq.corp.pbs.org> Content-Type: text/plain; charset="us-ascii" Apparently this never appeared the first time. -----Original Message----- From: Bruce Tiffany Sent: Thursday, February 04, 2010 9:18 PM To: 'firebird-net-provider@lists.sourceforge.net' Subject: connection pooling in a multithreading environment We encountered an error in FB 2.1.0 and 2.5.1 in some web applications: ================================================ Message: Object reference not set to an instance of an object. Source: FirebirdSql.Data.FirebirdClient Stack trace: at FirebirdSql.Data.FirebirdClient.FbCommand.RollbackImplicitTransaction() at FirebirdSql.Data.FirebirdClient.FbCommand.CommitImplicitTransaction() at FirebirdSql.Data.FirebirdClient.FbCommand.DiscardImplicitTransaction() at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteReader(CommandBehavior behavior) at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteDbDataReader(CommandBeh avior behavior) at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(Comman dBehavior behavior) at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) at System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) at System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) at <et-cetera> ================================================== Similar errors were occurring too frequently from various Firebird queries (all SELECT; no updates, deletions or insertions), some very simple, some very complex. We tried adding explicit transactions and committing in lieu of implicit transaction control, to no avail. We determined that the exception originated in the following Firebird code: public FbDataReader ExecuteReader(CommandBehavior behavior) { lock (this) { this.CheckCommand(); try { this.ExecuteCommand(behavior, true); } catch (IscException exception) { this.DiscardImplicitTransaction(); throw new FbException(exception.Message, exception); } catch { this.DiscardImplicitTransaction(); throw; } } this.activeReader = new FbDataReader(this, this.connection, behavior); return this.activeReader; } Specifically, the line "this.ExecuteCommand(behavior,true);". Because this line is enclosed within a try/catch block, the exception is handled. However, this alters program flow to the catch block. Inside the catch block, the DiscardImplicitTransaction() method is called before the Exception is thrown. Unfortunately, that method calls CommitImplicitTransaction: internal void CommitImplicitTransaction() { if ((this.HasImplicitTransaction && (this.transaction != null)) && (this.transaction.Transaction != null)) { try { this.transaction.Commit(); } catch (Exception) { this.RollbackImplicitTransaction(); throw; } finally { if (this.transaction != null) { this.transaction.Dispose(); this.transaction = null; this.implicitTransaction = false; } if (this.statement != null) { this.statement.Transaction = null; } } } } >From the stack trace we know the line "this.transaction.Commit()" throws a new Exception. Because the line is encased in a try/catch block, this exception is caught and program flow is redirected to the catch block. The catch block calls "this.RollbackImplicitTransaction()" before throwing the exception up the call stack. However, before the exception can be rethrown, this.RollbackImplicitTransation() throws the NullReferenceException. Here is the RollbackImplicitTransaction method: internal void RollbackImplicitTransaction() { if ((this.HasImplicitTransaction && (this.transaction != null)) && (this.transaction.Transaction != null)) { int transactionCount = this.Connection.InnerConnection.Database.TransactionCount; try { this.transaction.Rollback(); } catch { if (this.Connection.InnerConnection.Database.TransactionCount == transactionCount) { IDatabase database = this.Connection.InnerConnection.Database; database.TransactionCount--; } } finally { this.transaction.Dispose(); this.transaction = null; this.implicitTransaction = false; if (this.statement != null) { this.statement.Transaction = null; } } } } The NullReferenceException is not handled by the Firebird DLL and is passed up the call stack to our DLL. Consequently, we don't see the two original exceptions, making it next to impossible to infer what caused them. But I was able to finally figure it out. I was able to reproduce the error in a multithreaded environment. When I locked the code which called the DLL which uses Firebird, the error went away. Without the lock, the error also did not occur when our SQL DLL (issuing Firebird queries) was called serially (sequential calls rather than parallel). But when a bunch of threads were fired up all at once, dann war die Hoelle los. That is to say, one thread would bomb and take the rest with it. Ugly. This gave me a hunch as to what the problem was. I tried commenting out the "FbConnection.ClearAllPools()" statement, and voila! End of error. We had started clearing all pools a few years ago because we were seeing persistent connections on our servers, because the .NET Data Provider pools connections even after they are closed, so that they can be reused on the next call to the database. The pooled connection stays "alive" on the server until the application is closed; unfortunately, since these were web applications, they were never truly closed. So, when any thread issues a "clear all pools" command, it knocks the slats right out from under all the other threads sharing the connection pool. The solution was simply to change our connection string from "Pooling=True" to "Pooling=False". That fixed it. It rendered the "clear all pools" statement moot, although I commented it out for good measure, even though testing showed that it didn't hurt anything to leave it active. The small amount of overhead incurred by not pooling is much preferable to bombing. Thus, it appears that connection pooling in Firebird is mighty dangerous in a multithreading environment. You can, to be sure, use a lock block around all code which issues SQL commands to Firebird, and this will also prevent the error; but it will also create a bottleneck. Better just to turn connection pooling off. Comments and additional insight would be welcome and appreciated. Meryl Streep, Stephen Colbert, Yo Yo Ma and Eva Longoria You know their histories, now discover their roots FACES OF AMERICA with Henry Louis Gates Jr. Premiering Wednesday, February 10th, 8/7C http://www.pbs.org/facesofamerica ________________________________________________________________________ ____________ This email may contain material that is confidential or proprietary to PBS and is intended solely for use by the intended recipient. Any review, reliance or distribution of such material by others, or forwarding of such material without express permission, is strictly prohibited. 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