ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. in Vertx RabbitMQ Client

[dumdumdu...@gmail.com]

Hi,

I'm using Vertx RabbitMQ Client, which internally uses RabbitMQ Client (com.rabbitmq.client.impl.AMQConnection).

I'm trying to deploy something in Prod for first time and getting Error - 

com.rabbitmq.client.AuthenticationFailureException:  For details see the broker logfile.

       at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:338) ~[websocket-server-1.0-SNAPSHOT-fat.jar:?]

       at com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory.newConnection(RecoveryAwareAMQConnectionFactory.java:52) ~[websocket-server-1.0-SNAPSHOT-fat.jar:?]

       at com.rabbitmq.client.impl.recovery.AutorecoveringConnection.init(AutorecoveringConnection.java:108) ~[websocket-server-1.0-SNAPSHOT-fat.jar:?]

       at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:816) ~[websocket-server-1.0-SNAPSHOT-fat.jar:?]

       at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:778) ~[websocket-server-1.0-SNAPSHOT-fat.jar:?]

       at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:868) ~[websocket-server-1.0-SNAPSHOT-fat.jar:?]

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To be clear, there is no issue with credentials or other config values. I can publish to exchange and get messages from Queue using RabbitMQAdmin for same RabbitMQ Cluster just fine. However, when I try to run Java Code, I'm getting this error.

Going  by Code of com.rabbitmq.client.impl.AMQConnection, it seems this error "ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN." is returned by RabbitMQ.

Any ideas as to why this can happen?

[dumdumdu...@gmail.com]

Just to be sure, I'm using same Username And Password while trying to connect from Java Code.

[Michael Klishin]

We cannot suggest much with the amount of information provided.

See server logs, check the credentials, give `rabbitmqctl authenticate_user` a try [1] and make sure that

the user has been granted permissions for accessing the target vhost.

1. https://www.rabbitmq.com/man/rabbitmqctl.1.man.html

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MK

Staff Software Engineer, Pivotal/RabbitMQ

[Michael Klishin]

And, of course, remember that user "guest" cannot connect from remote hosts,

as mentioned in http://www.rabbitmq.com/access-control.html.

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MK

Staff Software Engineer, Pivotal/RabbitMQ

[dumdumdu...@gmail.com]

Hi both,

Thanks for the replies.

The Username and passsword are correct.

User is not "guest", and the user has access to virtual host.

Following commands work with all the values substituted - 

./rabbitmqadmin --host=<host> --vhost='/' --username=<user> --password=<password>  publish exchange=<exchange> routing_key="" payload="hello, world"

./rabbitmqadmin --host=<host> --vhost='/' --username=<user> --password=<password>  get queue=<queue_name> requeue=false

But the Java client is throwing Exception.

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MK

Staff Software Engineer, Pivotal/RabbitMQ

[Michael Klishin]

rabbitmqadmin does not use the same API as the Java client.

Please verify that the credentials are correct using `rabbitmqctl authenticate_user` as suggested above.

Then check that user's permission.

If that doesn't lead you to a solution, please do post server logs around the time of connection attempt

and consider posting your actual code. Please help others help you by following the advice provided.

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