RabbitMQ.Client.Exceptions.BrokerUnreachableException: 'None of the specified endpoints were reachab

[Ozi]

Hi

Just trying to get the tutorial to work. I'm on windows 10 with VS 2017, with both erlag and rabbitmq installed and running.

It fails trying to do:

 using(var connection = factory.CreateConnection())

using System;

using RabbitMQ.Client;

using System.Text;

class Program

{

    public static void Main()

    {

        var factory = new ConnectionFactory() { HostName = "localhost" };

        using(var connection = factory.CreateConnection())

        using(var channel = connection.CreateModel())

        {

            channel.QueueDeclare(queue: "hello", durable: false, exclusive: false, autoDelete: false, arguments: null);

            string message = "Hello World!";

            var body = Encoding.UTF8.GetBytes(message);

            channel.BasicPublish(exchange: "", routingKey: "hello", basicProperties: null, body: body);

            Console.WriteLine(" [x] Sent {0}", message);

        }

        Console.WriteLine(" Press [enter] to exit.");

        Console.ReadLine();

    }

}

RabbitMQ.Client.Exceptions.BrokerUnreachableException occurred

  HResult=0x80131620

  Message=None of the specified endpoints were reachable

  Source=RabbitMQ.Client

  StackTrace:

   at RabbitMQ.Client.ConnectionFactory.CreateConnection(IEndpointResolver endpointResolver, String clientProvidedName)

   at RabbitMQ.Client.ConnectionFactory.CreateConnection()

   at Program.Main() in C:\Working\Development\dotnet-visual-studio\1_Send\Program.cs:line 10

Inner Exception 1:

ConnectFailureException: Connection failed

Inner Exception 2:

SocketException: No connection could be made because the target machine actively refused it

I need to get this to work for a demo next week.

Cheers

Ozi

[Karl Nilsson]

Hi,

Are you confident RabbitMQ is running on localhost on port 5672? Can you check in your services and confirm the service is actually started and running. Failing that you may want to inspect the broker logs to see if anything has gone wrong during startup.

Cheers

Karl

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Karl Nilsson

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[Ozi]

Hi Karl

Yes I can confirm that the service is running.

"C:\Program Files\erl8.3\erts-8.3\bin\erlsrv.exe"

[Karl Nilsson]

Could you use telnet or netstat to check that the socket is actually listening and accepting connections?

e.g: 

telnet localhost 5672

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Pivotal/RabbitMQ

[Michael Klishin]

An important note: if you don't provide a valid protocol preamble after connecting with telnet,
RabbitMQ will close the connection after several seconds (5 or 10 by default, IIRC).

This is expected.

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>
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> --
> Karl Nilsson
>
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Staff Software Engineer, Pivotal/RabbitMQ

[Ozi]

The debug message I'm getting is :

SocketErrorCode : ConnectionRefused  -  System.Net.Sockets.SocketError

No connection could be made because the target machine actively refused it 127.0.0.1:5672

   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)

   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)

   at System.Net.Sockets.Socket.Connect(IPAddress address, Int32 port)

   at RabbitMQ.Client.TcpClientAdapter.<ConnectAsync>d__2.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at RabbitMQ.Client.Impl.TaskExtensions.<TimeoutAfter>d__0.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

   at RabbitMQ.Client.Impl.SocketFrameHandler.Connect(ITcpClient socket, AmqpTcpEndpoint endpoint, Int32 timeout)

ErrorCode 10061

TargetSite {T SelectOne[T](RabbitMQ.Client.IEndpointResolver, System.Func`2[RabbitMQ.Client.AmqpTcpEndpoint,T])} System.Reflection.MethodBase {System.Reflection.RuntimeMethodInfo}

[Michael Klishin]

"actively refused it" is networking speak for "there was no listener on that interface and port"

or that the connection was rejected e.g. by the firewall or a security tool.

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[Ozi]

Another dev on win 7 has it working, but I'll take the issue up the our network people.

Thanks

[Michael Klishin]

Since you are connecting to localhost the matter likely has nothing to do with
networking per se.

Either the node isn't running, or it bindings to a different interface (by default: all interfaces available),
or it uses a different port, or something prevents the client from opening a TCP connection to that port. 

On 16 May 2017 at 23:59:45, Ozi (ozitra...@gmail.com) wrote:
> Another dev on win 7 has it working, but I'll take the issue up the our
> network people.
>
> Thanks
>
> On Wednesday, May 17, 2017 at 7:47:42 AM UTC+10, Michael Klishin wrote:
> >
> > "actively refused it" is networking speak for "there was no listener on
> > that interface and port"
> > or that the connection was rejected e.g. by the firewall or a security
> > tool.
> >
> > On Tue, May 16, 2017 at 10:45 PM, Ozi >

> > wrote:
> >
> >> The debug message I'm getting is :
> >>
> >> SocketErrorCode : ConnectionRefused - System.Net.Sockets.SocketError
> >>
> >> No connection could be made because the target machine actively refused
> >> it 127.0.0.1:5672
> >>
> >> at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot,
> >> SocketAddress socketAddress)
> >> at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
> >> at System.Net.Sockets.Socket.Connect(IPAddress address, Int32 port)

> >> at RabbitMQ.Client.TcpClientAdapter.d__2.MoveNext()

> >> --- End of stack trace from previous location where exception was thrown
> >> ---
> >> at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
> >> task)
> >> at
> >> System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
> >> task)

> >> at RabbitMQ.Client.Impl.TaskExtensions.d__0.MoveNext()

[Ozi]

I've given up on localhost, and am connected to rabbitmq in a docker container.

Thanks

On Tuesday, May 16, 2017 at 4:20:56 PM UTC+10, Ozi wrote:

[Michael Klishin]

That's an important piece of information that was not mentioned at the time you'd posted the stack trace.

While it shouldn't result in a "connection reset" with a modern version of the .NET client that supports
[1], please beware of the fact that user "guest" can only connect from localhost [2] by default.
Such authorization failures will be easily visible in the log.

1. https://www.rabbitmq.com/auth-notification.html
2. http://www.rabbitmq.com/access-control.html

[Ozi]

I only managed to connect to rabbitMQ in docker this morning, after I spoke to another dev who managed to connect last night after I left.

The logs in AppData\Roaming\RabbitMQ\log are empty and erl_crash.dump only had a cookie error