NullReferenceException at GdsDatabase.Write(Int32 value)
--------------------------------------------------------
Key: DNET-291
URL: http://tracker.firebirdsql.org/browse/DNET-291
Project: .NET Data provider
Issue Type: Bug
Components: ADO.NET Provider
Affects Versions: 2.5.1
Environment: windows 2003 + .net 3.5 + asp.net + fb 2.1.3
Reporter: lifeng liang
Assignee: Jiri Cincura
I am using fb for my web site, and found a bug of its .net provider. The same
page same code ran into this problem about once per week. I compiled fb .net
provider 2.5.1 as DEBUG mode, and following is the stack track of it:
System.NullReferenceException:
at FirebirdSql.Data.Client.Managed.Version10.GdsDatabase.Write(Int32 value)
location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\Client\Managed\Version10\GdsDatabase.cs:line
978
at
FirebirdSql.Data.Client.Managed.Version10.GdsTransaction.BeginTransaction(TransactionParameterBuffer
tpb) location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\Client\Managed\Version10\GdsTransaction.cs:line
137
at
FirebirdSql.Data.Client.Managed.Version10.GdsDatabase.BeginTransaction(TransactionParameterBuffer
tpb) location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\Client\Managed\Version10\GdsDatabase.cs:line
556
at FirebirdSql.Data.FirebirdClient.FbTransaction.BeginTransaction() location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbTransaction.cs:line
363
at FirebirdSql.Data.FirebirdClient.FbCommand.Prepare(Boolean returnsSet)
location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs:line
1111
at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteCommand(CommandBehavior
behavior, Boolean returnsSet) location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs:line
1174
at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteReader(CommandBehavior
behavior) location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs:line
551
at
FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteDbDataReader(CommandBehavior
behavior) location
D:\Coding\Projects\FirebirdClient-2.5.1-src\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbCommand.cs:line
621
at
System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior
behavior)
Since GdsDatabase.Write only has one line code and the parameter value could
not be null, it should be outputStream equels null somehow. And I checked all
usages of outputStream, I guess GdsDatabase.Detach was called sometime and
might related of connection pooling.
The following is my connection string:
User=XXX;Password=BBB;Database=studio.fdb;DataSource=localhost;Port=3050;Dialect=3;Charset=UNICODE_FSS;Role=;Connection
lifetime=15;Pooling=true;MinPoolSize=0;MaxPoolSize=50;Packet
Size=8192;ServerType=0
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