php小編新一今天為大家介紹的是Spring AMQP，它是一種基於AMQP協(xié)定的訊息傳遞框架。然而，有時(shí)在使用Spring AMQP時(shí)，我們可能會(huì)遇到一個(gè)錯(cuò)誤：「未找到相容的身份驗(yàn)證機(jī)制 - 提供伺服器」。這個(gè)錯(cuò)誤提示可能會(huì)讓人感到困惑，不知道該如何解決。接下來，我們將詳細(xì)解釋這個(gè)錯(cuò)誤的原因，並提供解決方案，幫助大家順利使用Spring AMQP框架。

問題內(nèi)容

我正在嘗試透過外部驗(yàn)證機(jī)制將spring boot 應(yīng)用程式連接到rabbit mq (https://github.com/rabbitmq/rabbitmq-auth-mechanism-ssl) 。

我收到以下錯(cuò)誤：

org.springframework.amqp.amqpioexception: java.io.ioexception: no compatible authentication mechanism found - server offered []
    at org.springframework.amqp.rabbit.support.rabbitexceptiontranslator.convertrabbitaccessexception(rabbitexceptiontranslator.java:70) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.connection.abstractconnectionfactory.createbareconnection(abstractconnectionfactory.java:594) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.connection.cachingconnectionfactory.createconnection(cachingconnectionfactory.java:687) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.connection.connectionfactoryutils.createconnection(connectionfactoryutils.java:257) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.core.rabbittemplate.doexecute(rabbittemplate.java:2225) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.core.rabbittemplate.execute(rabbittemplate.java:2198) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.core.rabbittemplate.execute(rabbittemplate.java:2178) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.core.rabbitadmin.getqueueinfo(rabbitadmin.java:459) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.core.rabbitadmin.getqueueproperties(rabbitadmin.java:443) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.listener.abstractmessagelistenercontainer.attemptdeclarations(abstractmessagelistenercontainer.java:1891) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.listener.abstractmessagelistenercontainer.redeclareelementsifnecessary(abstractmessagelistenercontainer.java:1858) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.listener.simplemessagelistenercontainer$asyncmessageprocessingconsumer.initialize(simplemessagelistenercontainer.java:1384) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.listener.simplemessagelistenercontainer$asyncmessageprocessingconsumer.run(simplemessagelistenercontainer.java:1230) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at java.base/java.lang.thread.run(thread.java:833) ~[na:na]
caused by: java.io.ioexception: no compatible authentication mechanism found - server offered []
    at com.rabbitmq.client.impl.amqconnection.start(amqconnection.java:343) ~[amqp-client-5.17.0.jar:5.17.0]
    at com.rabbitmq.client.connectionfactory.newconnection(connectionfactory.java:1225) ~[amqp-client-5.17.0.jar:5.17.0]
    at com.rabbitmq.client.connectionfactory.newconnection(connectionfactory.java:1173) ~[amqp-client-5.17.0.jar:5.17.0]
    at org.springframework.amqp.rabbit.connection.abstractconnectionfactory.connectaddresses(abstractconnectionfactory.java:632) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.connection.abstractconnectionfactory.connect(abstractconnectionfactory.java:607) ~[spring-rabbit-3.0.5.jar:3.0.5]
    at org.springframework.amqp.rabbit.connection.abstractconnectionfactory.createbareconnection(abstractconnectionfactory.java:557) ~[spring-rabbit-3.0.5.jar:3.0.5]
    ... 12 common frames omitted

依賴關(guān)係：

<dependency>
                <groupid>org.springframework.boot</groupid>
                <artifactid>spring-boot-starter-amqp</artifactid>
                <version>3.2.1</version>
            </dependency>

rabbitmq版本：rabbitmq:3.12.1-management

rabbitmq.conf 包含這些屬性：

default_user=guest
default_pass=guest
listeners.tcp=none
listeners.ssl.default=5672
ssl_options.cacertfile=/etc/rabbitmq/cert/ca_bundle.pem
ssl_options.certfile=/etc/rabbitmq/cert/certificate.pem
ssl_options.keyfile=/etc/rabbitmq/cert/key.pem
ssl_options.password=pass
ssl_options.verify=verify_peer
ssl_options.fail_if_no_peer_cert=true
ssl_options.versions.1=tlsv1.2
ssl_options.depth=1
auth_mechanisms.1=external
ssl_cert_login_from=common_name

應(yīng)用程式屬性：

spring.rabbitmq.ssl.enabled=true
spring.rabbitmq.ssl.algorithm=tlsv1.2
spring.rabbitmq.ssl.key-store=keystore.p12
spring.rabbitmq.ssl.key-store-password=pass
spring.rabbitmq.ssl.key-store-type=pkcs12
spring.rabbitmq.ssl.trust-store=truststore.p12
spring.rabbitmq.ssl.trust-store-password=pass
spring.rabbitmq.ssl.trust-store-type=pkcs12

我宣告了以下方法來包含 sasl 設(shè)定：

@Bean
  public AmqpTemplate amqpTemplate(ConnectionFactory connectionFactory) {
    CachingConnectionFactory cachingConnectionFactory = (CachingConnectionFactory) connectionFactory;
    cachingConnectionFactory.getRabbitConnectionFactory().setAutomaticRecoveryEnabled(true);
    cachingConnectionFactory.getRabbitConnectionFactory().setSaslConfig(DefaultSaslConfig.EXTERNAL);
    cachingConnectionFactory.resetConnection();

    RabbitTemplate rabbitTemplate = new RabbitTemplate(cachingConnectionFactory);
    rabbitTemplate.setMessageConverter(converter());
    return rabbitTemplate;
  }

解決方法

我不確定rabbitmq 配置端的listeners.ssl.default=5672 是什麼，但聽起來您將預(yù)設(shè)的ssl 連接埠覆蓋到該端口。

spring boot中的邏輯是這樣的：

return (optional.ofnullable(getssl().getenabled()).orelse(false)) ? default_port_secure : default_port;

地點(diǎn)：

private static final int default_port_secure = 5671;

因此，可能需要考慮明確提供該連接埠：

spring.rabbitmq.port=5672

您可能也不需要自訂rabbittemplate bean，只需新增connectionfactorycustomizer 即可將defaultsaslconfig.external 設(shè)定為自動(dòng)配置的com .rabbitmq.client.connectionfactory。

也不建議使用 setautomaticrecoveryenabled(true): http://m.miracleart.cn/link/3c0de3fec9ab8a3df01109251f137119

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