ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker

[kamal...@gmail.com]

I have installed rabbitmq 3.7.7 on my Red hat 7 EC2 instance. I having this following issue when I run my application container to connect to rabbitmq. 

Caused by: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.

at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:349) ~[amqp-client-4.1.0.jar!/:4.1.0]

at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:920) ~[amqp-client-4.1.0.jar!/:4.1.0]

at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:870) ~[amqp-client-4.1.0.jar!/:4.1.0]

at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:810) ~[amqp-client-4.1.0.jar!/:4.1.0]

at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:351) ~[spring-rabbit-1.7.1.RELEASE.jar!/:?]

at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:595) ~[spring-rabbit-1.7.1.RELEASE.jar!/:?]

at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1430) ~[spring-rabbit-1.7.1.RELEASE.jar!/:?]

at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1411) ~[spring-rabbit-1.7.1.RELEASE.jar!/:?]

at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1387) ~[spring-rabbit-1.7.1.RELEASE.jar!/:?]

at org.springframework.amqp.rabbit.core.RabbitAdmin.declareExchange(RabbitAdmin.java:157) ~[spring-rabbit-1.7.1.RELEASE.jar!/:?]

at com.capitalone.cerberus.common.config.CerberusRabbitMQConfig.declareExchange(CerberusRabbitMQConfig.java:177) ~[cerberus-common-03.00.00.65.jar!/:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_171]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_171]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_171]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_171]

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.3.1.RELEASE.jar!/:4.3.1

[Michael Klishin]

The error is has a specific suggestion: see server logs as all connection attempts that send at least 1 byte of data

are logged, whether they are successful or not [1]. [2][3][4] cover user management, virtual hosts, permissions and the fact

that the default user ("guest") can only connect from localhost by default for security reasons.

1. http://www.rabbitmq.com/logging.html#logged-events

2. http://www.rabbitmq.com/access-control.html

3. http://www.rabbitmq.com/vhosts.html

4. http://www.rabbitmq.com/rabbitmqctl.8.html

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MK

Staff Software Engineer, Pivotal/RabbitMQ

[kamal...@gmail.com]

Thank you for your reply here I have found this on my logs 

2018-08-18 15:00:00.568 [info] <0.557.0> accepting AMQP connection <0.557.0> (127.0.0.1:47874 -> 127.0.0.1:5672)

2018-08-18 15:00:00.601 [info] <0.557.0> Connection <0.557.0> (127.0.0.1:47874 -> 127.0.0.1:5672) has a client-provided name: rabbitGeneralConnFactory#0

2018-08-18 15:00:00.602 [error] <0.557.0> Error on AMQP connection <0.557.0> (127.0.0.1:47874 -> 127.0.0.1:5672, state: starting):

PLAIN login refused: user 'guest' - invalid credentials

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[Michael Klishin]

> PLAIN login refused: user 'guest' - invalid credentials

is pretty specific. If the internal authentication/authorization backend is used, [1] is an easy

way to verify use credentials. Make sure each value is quoted appropriately for your shell.

Obviously the credentials can be changed. We recommend avoiding the "guest" user outside of local development

environments and creating a new one [2].

1. http://www.rabbitmq.com/rabbitmqctl.8.html#authenticate_user

2. http://www.rabbitmq.com/production-checklist.html#users

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