RabbitMQ Connection Error " None of the specified endpoints were reachable"

Question

I installed rabbitmq service on the server and on my system. I want to use RPC pattern:

var factory = new ConnectionFactory() { 
  HostName = "158.2.14.42", 
  Port = Protocols.DefaultProtocol.DefaultPort, 
  UserName = "Administrator", 
  Password = "@server@", 
  VirtualHost = "/"
  ContinuationTimeout = new TimeSpan(10, 0, 0, 0) 
};

connection = factory.CreateConnection();

I have an error on creating connection with this message:
None of the specified endpoints were reachable

When I use it on localhost instance of the server it works, but when I create the connection from local to that server,it returned the error. It not work with local ip and username and password of the my local computer.

Can anyone help me?

Inflated

Possible duplicate of RabbitMQ C# connection trouble when using a username and password – Hurryscurry

@RazvanDumitru , I do like that but still have the error. and code doesn't recognize FromEnvironment – Inflated

@RazvanDumitru Thank you,your guidance helped me. – Inflated

@parsa what you have done for FromEnvironment ? – Hospital

Answer 1

As this question mentioned.
After I installed RabbitMQ, I enabled management tools on the server and on my local computer with this:

rabbitmq-plugins enable rabbitmq_management

Then I restarted RabbitMQ service from services.msc
I could see the Rabbitmq management at http://localhost:15672
I logged in to rabbit management with user:guest and pass:guest
I added my favorite user pass with administrator access, so it worked.

Inflated

In my case I was working with another VHost, so go to "Users" => and then click on the "virtual host" dropdown, select your VHost and click on "set permission". Works like a charm – Eradicate

Answer 2

I was also facing the same issue and later realized I have to open both ports i.e. 15672 and 5672.

The below command works for me in the docker container model.

docker run -it --rm --name mymq -p 5672:5672 -p 15672:15672 rabbitmq:3-management

Code snippet:

 var factory = new RabbitMQ.Client.ConnectionFactory
            {
                Uri = new Uri("amqp://guest:guest@localhost:5672/")
            };

or

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

Lyublin

Answer 3

Do not use guest. Create your own account and password, and in http://localhost:15672/#/users , ensure "can access virtual hosts " is "/"

var factory = new ConnectionFactory() { 
  HostName = "192.168.1.121",
  Port = 5672,
  UserName = "fancky", 
  Password = "123456" 
};

Sharpie

Answer 4

In our case it was an assembly binding failure of System.Threading.Tasks.Extensions, our exception logger was not logging the InnerException

Exception information: 
    Exception type: FileLoadException 
    Exception message: Could not load file or assembly 'System.Threading.Channels, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
   at RabbitMQ.Client.Framing.Impl.AutorecoveringConnection..ctor(ConnectionFactory factory, String clientProvidedName)
   at RabbitMQ.Client.ConnectionFactory.CreateConnection(IEndpointResolver endpointResolver, String clientProvidedName) in /_/projects/RabbitMQ.Client/client/api/ConnectionFactory.cs:line 494

Very poor misleading error message.

Future

Answer 5

If the project is dockerized:

host.docker.internal (or appropriate URL...) should be used instead of localhost.

Vereeniging

Answer 6

it means that the client can't reach the server 158.2.14.42 and default vhost /.

Maybe a firewall configuration

Connive

I Add 5672 port on widnows firewall of server, but it not solved. – Inflated

Any recommendation? is there any solution that I must be do that? – Inflated

Answer 7

By default as you say RabbitMQ will listen on 5672 but this can be changed, if you have a look at your config (on the MQ server) you should find a section:

rabbit.tcp_listeners

which will detail the port being used. Check it's what you think it is.

Also, are you using IPv4 or IPv6? you may need to have additional config to support both.

Have a read of this:

https://www.rabbitmq.com/networking.html

Cammie

It says as the default, RabbitMQ will listen on port 5672 on all available interfaces. on config file,must be I change on anything? – Inflated

Answer 8

1) Open RabbitMQ Command Promp

2) Change path to "C:\Program Files\RabbitMQ Server\rabbitmq_server-3.6.10\sbin" where rabbitmq_server installed.

3) Run following commamd : rabbitmq-plugins enable rabbitmq_management

If Firewall has blocked it, then popup display. Allow Firewall for this.

now you can access in browser.

Hexone

Answer 9

Misleading error. The local version works ok but the remote server didn't. Turned out I did not supply the credentials i.e. username and password which are mandatory for remote server. Local server happily connects without them.

Honghonied

Answer 10

I've been experiencing this very issue, and in the end it was just about having provided the URI as lowercase, while the name of the machine was uppercase.

As it took a couple of hours to figure it out, I thought it might help someone else.

Bleeding

Answer 11

I created a small application using .netcore and rabbitmq and created the image in docker for both of them using below docker-compose code -

version: '3'
services:
rabbitmq:
container_name: rabbitmq
hostname: "rabbitmq"
image: rabbitmq:3-management
ports:
- "5672:5672"
- "15672:15672"
volumes:
- rabbitmq:/rabbitmq
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost:15672"]
interval: 30s
timeout: 10s
retries: 5

isp_hub:
depends_on:
- rabbitmq
build:
context: .
dockerfile: Dockerfile
ports:
- "9090:80"

volumes:
rabbitmq:

after running the cmd docker-compose up the image is created and container is started and i am using Jmeter client to hit the container .net code is working but while trying to pass the data in queue getting below exception -

"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:22.6109672Z"}
{"log":" Application is shutting down...\r\n","stream":"stdout","time":"2022-04-04T08:25:22.6109672Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4488984Z"}
{"log":" Now listening on: http://[::]:80\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4488984Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":" Application started. Press Ctrl+C to shut down.\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":" Hosting environment: Production\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":"info: Microsoft.Hosting.Lifetime[0]\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":" Content root path: C:\app\r\n","stream":"stdout","time":"2022-04-04T08:25:38.4498991Z"}
{"log":"fail: Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher[8]\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" Failed to invoke hub method 'SendToMessageBroker'.\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" RabbitMQ.Client.Exceptions.BrokerUnreachableException: None of the specified endpoints were reachable\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" ---\u003e System.AggregateException: One or more errors occurred. (Connection failed)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" ---\u003e RabbitMQ.Client.Exceptions.ConnectFailureException: Connection failed\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" ---\u003e System.Net.Sockets.SocketException (10061): No connection could be made because the target machine actively refused it.\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at System.Threading.Tasks.ValueTask.ValueTaskSourceAsTask.\u003c\u003ec.\u003c.cctor\u003eb__4_0(Object state)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" --- End of stack trace from previous location ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.TcpClientAdapter.ConnectAsync(String host, Int32 port)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.TaskExtensions.TimeoutAfter(Task task, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectOrFail(ITcpClient socket, AmqpTcpEndpoint endpoint, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" --- End of inner exception stack trace ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectOrFail(ITcpClient socket, AmqpTcpEndpoint endpoint, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectUsingAddressFamily(AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan timeout, AddressFamily family)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectUsingIPv4(AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan timeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Impl.SocketFrameHandler..ctor(AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan connectionTimeout, TimeSpan readTimeout, TimeSpan writeTimeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at RabbitMQ.Client.Framing.Impl.IProtocolExtensions.CreateFrameHandler(IProtocol protocol, AmqpTcpEndpoint endpoint, Func2 socketFactory, TimeSpan connectionTimeout, TimeSpan readTimeout, TimeSpan writeTimeout)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateFrameHandler(AmqpTcpEndpoint endpoint)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.EndpointResolverExtensions.SelectOne[T](IEndpointResolver resolver, Func2 selector)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" --- End of inner exception stack trace ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at RabbitMQ.Client.EndpointResolverExtensions.SelectOne[T](IEndpointResolver resolver, Func2 selector)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.Framing.Impl.AutorecoveringConnection.Init(IEndpointResolver endpoints)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection(IEndpointResolver endpointResolver, String clientProvidedName)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" --- End of inner exception stack trace ---\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection(IEndpointResolver endpointResolver, String clientProvidedName)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection(String clientProvidedName)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at RabbitMQ.Client.ConnectionFactory.CreateConnection()\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at ISP_Hub.HubConfig.CenterHub.SendToMessageBroker(String requestData) in C:\src\ISP_Hub\HubConfig\CenterHub.cs:line 38\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at Microsoft.Extensions.Internal.ObjectMethodExecutor.\u003c\u003ec__DisplayClass33_0.\u003cWrapVoidMethod\u003eb__0(Object target, Object[] parameters)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}
{"log":" at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher1.ExecuteMethod(ObjectMethodExecutor methodExecutor, Hub hub, Object[] arguments)\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"} {"log":" at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher1.\u003c\u003ec__DisplayClass16_0.\u003c\u003cInvoke\u003eg__ExecuteInvocation|0\u003ed.MoveNext()\r\n","stream":"stdout","time":"2022-04-04T08:26:55.7889752Z"}

rabbitmq connection code -

public void SendToMessageBroker(string requestData)
{
var trace = JsonConvert.DeserializeObject(requestData);
// string rabbitMqUrl = "127.0.0.1";
// var factory = new ConnectionFactory() { HostName = "172.24.17.225", Port = 5672 };
//var factory = new ConnectionFactory
//{
// HostName = rabbitMqUrl,
// UserName = "guest",
// Password = "guest",
// Port = AmqpTcpEndpoint.UseDefaultPort,
// VirtualHost = "/",
// RequestedHeartbeat = new TimeSpan(60),
// Ssl = { ServerName = rabbitMqUrl, Enabled = false }
//};
var factory = new RabbitMQ.Client.ConnectionFactory
{
Uri = new Uri("amqp://guest:guest@localhost:5672/")
};
using var conn = factory.CreateConnection();
using var channel = conn.CreateModel();
RabbitMQPublisher.Publish(channel, trace);
Clients.All.SendAsync("test");
channel.Close();
conn.Close();
Debug.WriteLine("Show Message: " + requestData);

    }
i am new to docker . please help me to understand the issue and how to resolve it

Drews

This does not really answer the question. If you have a different question, you can ask it by clicking Ask Question. To get notified when this question gets new answers, you can follow this question. Once you have enough reputation, you can also add a bounty to draw more attention to this question. - From Review – Spiny

Answer 12

Don't know if it helps you but it happen after update RabbitMQ.Client from 5.1.2 to 5.2.0 for .net 4.6.1. If you rise target framework to 4.8 it goes through.

People

Answer 13

My issue was that I created a user of guest with password guest and apparently that does not work. Once I chose a different username and password, it worked for me.

Papyrology

Answer 14

In my case, after doing everything mentioned in above questions, when I update docker desktop and use latest rabbitmq: management, then connected perfectly.

Shang