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bahia
 Post subject: Value cannot be null. Parameter name: stream
PostPosted: Sun Jul 05, 2009 11:56 pm 
Newbie

Joined: Sun Jul 05, 2009 11:33 pm
Posts: 1
Hi guys.
i'm using hibernate with java, it's ok.
But when i try to use NHibernate with .Net don't work.
I'm tired for searching any way for solve this question, but didn't find...
i'm getting this exception:
Code:
System.ArgumentNullException was unhandled
  Message="Value cannot be null.\r\nParameter name: stream"
  Source="mscorlib"
  ParamName="stream"
  StackTrace:
       at System.IO.StreamReader..ctor(Stream stream, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize)
       at System.IO.StreamReader..ctor(Stream stream)
       at MySql.Data.MySqlClient.SchemaProvider.GetReservedWords()
       at MySql.Data.MySqlClient.SchemaProvider.GetSchemaInternal(String collection, String[] restrictions)
       at MySql.Data.MySqlClient.ISSchemaProvider.GetSchemaInternal(String collection, String[] restrictions)
       at MySql.Data.MySqlClient.SchemaProvider.GetSchema(String collection, String[] restrictions)
       at MySql.Data.MySqlClient.MySqlConnection.GetSchema(String collectionName, String[] restrictionValues)
       at MySql.Data.MySqlClient.MySqlConnection.GetSchema(String collectionName)
       at NHibernate.Dialect.Schema.MySQLDataBaseSchema.GetReservedWords() in c:\CSharp\NH2.1.x\nhibernate\src\NHibernate\Dialect\Schema\MySQLMetaData.cs:line 27
       at NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.GetReservedWords(Dialect dialect, IConnectionHelper connectionHelper) in c:\CSharp\NH2.1.x\nhibernate\src\NHibernate\Tool\hbm2ddl\SchemaMetadataUpdater.cs:line 47
       at NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.Update(ISessionFactory sessionFactory) in c:\CSharp\NH2.1.x\nhibernate\src\NHibernate\Tool\hbm2ddl\SchemaMetadataUpdater.cs:line 17
       at NHibernate.Impl.SessionFactoryImpl..ctor(Configuration cfg, IMapping mapping, Settings settings, EventListeners listeners) in c:\CSharp\NH2.1.x\nhibernate\src\NHibernate\Impl\SessionFactoryImpl.cs:line 169
       at NHibernate.Cfg.Configuration.BuildSessionFactory() in c:\CSharp\NH2.1.x\nhibernate\src\NHibernate\Cfg\Configuration.cs:line 1134
       at FirstSolution.Form1.Form1_Load(Object sender, EventArgs e) in D:\Testes\nhibernate\FirstSolution\FirstSolution\Form1.cs:line 52
       at System.Windows.Forms.Form.OnLoad(EventArgs e)
       at System.Windows.Forms.Form.OnCreateControl()
       at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
       at System.Windows.Forms.Control.CreateControl()
       at System.Windows.Forms.Control.WmShowWindow(Message& m)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at System.Windows.Forms.ContainerControl.WndProc(Message& m)
       at System.Windows.Forms.Form.WmShowWindow(Message& m)
       at System.Windows.Forms.Form.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)
       at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
       at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
       at System.Windows.Forms.Control.set_Visible(Boolean value)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at FirstSolution.Program.Main() in D:\Testes\nhibernate\FirstSolution\FirstSolution\Program.cs:line 17
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()


I don't have more ideas for resolve this problem...
My configuration is in app.config, and i put only one mapping for my test in code.
Configuration cfg = new Configuration().Configure();
cfg.AddFile("MyTable.hbm.xml");
ISessionFactory factory = cfg.BuildSessionFactory();//Error here

Thanks in advanced for any help.
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oblivionsy
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Mon Jul 20, 2009 1:57 pm 
Beginner
Beginner

Joined: Fri Jun 01, 2007 4:55 pm
Posts: 24
I too am getting this error - did you find a solution?
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rstuven
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Tue Jul 21, 2009 1:32 am 
Newbie

Joined: Sat May 26, 2007 9:37 pm
Posts: 2
Same exception here. But after upgrading to MySql Connector/Net 6.0 now I get this exception:
Code:
System.ArgumentException: La columna 'Reserved Word' no pertenece a la tabla ReservedWords.
en System.Data.DataRow.GetDataColumn(String columnName)
en System.Data.DataRow.get_Item(String columnName)
en NHibernate.Dialect.Schema.MySQLDataBaseSchema.GetReservedWords()
en NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.GetReservedWords(Dialect dialect, IConnectionHelper connectionHelper)
en NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.Update(ISessionFactory sessionFactory)
en NHibernate.Impl.SessionFactoryImpl..ctor(Configuration cfg, IMapping mapping, Settings settings, EventListeners listeners)
en NHibernate.Cfg.Configuration.BuildSessionFactory()
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oblivionsy
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Tue Jul 21, 2009 4:15 am 
Beginner
Beginner

Joined: Fri Jun 01, 2007 4:55 pm
Posts: 24
This too is where I am at :-( Lovely job for this morning to try and fix. I'll post back if I magicaly solve the issue.
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oblivionsy
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Tue Jul 21, 2009 4:22 am 
Beginner
Beginner

Joined: Fri Jun 01, 2007 4:55 pm
Posts: 24
http://nhjira.koah.net/browse/NH-1828

Looks like it is not a configuration setting or fix we can make... seems that is will be deeper :-(
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haxen
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Wed Sep 30, 2009 2:29 pm 
Newbie

Joined: Wed Sep 30, 2009 2:26 pm
Posts: 1
Location: Stockholm
I have the same error, someone have a workaround or solution?
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mhenneman
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Fri Oct 02, 2009 2:56 pm 
Newbie

Joined: Fri Oct 02, 2009 2:54 pm
Posts: 3
I have the same problem. I use Fluent NHibernate and mysql data driver 5.0.9.0
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mhenneman
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Fri Oct 02, 2009 3:23 pm 
Newbie

Joined: Fri Oct 02, 2009 2:54 pm
Posts: 3
I try the mysql connector/net6.1 (http://dev.mysql.com/downloads/connector/net/6.1.html) and then i got the error Column ‘ReservedWord’ does not belong to table ReservedWords.
You can fix that with .ExposeConfiguration(cf => cf.Properties.Add("hbm2ddl.keywords", "none"))
http://stackoverflow.com/questions/1061 ... long-to-ta and see also viewtopic.php?f=25&t=997701

Mark
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curea
 Post subject: Re: Value cannot be null. Parameter name: stream
PostPosted: Thu Nov 26, 2009 8:44 pm 
Newbie

Joined: Sun Jan 01, 2006 1:16 am
Posts: 5
I too had this error, and updated my MySQL provider to 6.2, and it went away.
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