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https://issues.apache.org/activemq/browse/AMQNET-19?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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james strachan moved AMQ-1145 to AMQNET-19:
-------------------------------------------
Fix Version/s: (was: 4.1.1)
(was: 4.2.0)
1.0
Component/s: (was: NMS (C# client))
Affects Version/s: (was: 4.1.0)
Key: AMQNET-19 (was: AMQ-1145)
Project: ActiveMQ .Net (was: ActiveMQ)
> C# Client CRASHES when trying to do Connection.Start()
> ------------------------------------------------------
>
> Key: AMQNET-19
> URL: https://issues.apache.org/activemq/browse/AMQNET-19
> Project: ActiveMQ .Net
> Issue Type: Bug
> Environment: NMS C# revision 501459
> ACTIVEMQ v. 4.1.0
> Reporter: Denis Abramov
> Priority: Blocker
> Fix For: 1.0
>
>
> A few days ago I checked out the latest C#/.NET code using svn as per the
> instructions on the website. Revision: "Checked out revision 501459". I built
> the code without any problems but am now trying to run it in VS2005. From the
> debugger it looks like the error occurs when I call _connection.Start() Here
> is my code:
> private IConnection _connection;
> private string JMS_URL = "tcp://localhost:61616";
> public MessageManager() {
> IConnectionFactory connectionFactory = new ConnectionFactory(new
> Uri(JMS_URL));
> _connection = connectionFactory.CreateConnection();
> _connection.ExceptionListener += new
> ExceptionListener(_connection_ExceptionListener);
> _connection.Start();
> }
> void _connection_ExceptionListener(Exception exception)
> {
> Console.WriteLine("Received Exception from JMS: " + exception);
> }
>
> In the console window I get:
> Received Exception from JMS: System.NullReferenceException: Object reference
> not
> set to an instance of an object.
> at ActiveMQ.Transport.WireFormatNegotiator.OnCommand(ITransport sender,
> Comma
> nd command)
> at ActiveMQ.Transport.Tcp.TcpTransport.ReadLoop()
> Received Exception from JMS: System.NullReferenceException: Object reference
> not
> set to an instance of an object.
> at ActiveMQ.Transport.WireFormatNegotiator.OnCommand(ITransport sender,
> Comma
> nd command)
> at ActiveMQ.Transport.Tcp.TcpTransport.ReadLoop()
> Received Exception from JMS: System.NullReferenceException: Object reference
> not
> set to an instance of an object.
> at ActiveMQ.Transport.WireFormatNegotiator.OnCommand(ITransport sender,
> Comma
> nd command)
> at ActiveMQ.Transport.Tcp.TcpTransport.ReadLoop()
> Received Exception from JMS: System.NullReferenceException: Object reference
> not
> set to an instance of an object.
> at ActiveMQ.Transport.WireFormatNegotiator.OnCommand(ITransport sender,
> Comma
> nd command)
> at ActiveMQ.Transport.Tcp.TcpTransport.ReadLoop()
> More concrete error after debugging using ActiveMQ source code:
> -------------------------------------------------------------------------------------------
> in ActiveMQ.Transport.WireFormatNegotiator the "command" argument is
> sometimes "Null" -- not sure why it happens or how to fix it (protecting it
> doesn't help but hangs the whole system)
> protected override void OnCommand(ITransport sender, Command command)
> {
> if ( command.GetDataStructureType() ==
> WireFormatInfo.ID_WireFormatInfo )
> ...
> }
> Complete error message:
> System.NullReferenceException: Object reference not set to an instance of an
> object.
> at ActiveMQ.Transport.WireFormatNegotiator.OnCommand(ITransport sender,
> Command command) in
> D:\activemq-dotnet\activemq-dotnet\src\main\csharp\ActiveMQ\Transport\WireFormatNegotiator.cs:line
> 75
> at ActiveMQ.Transport.Tcp.TcpTransport.ReadLoop() in
> D:\activemq-dotnet\activemq-dotnet\src\main\csharp\ActiveMQ\Transport\Tcp\TcpTransport.cs:line
> 146
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