当我在Tomcat 8.5.23中重新部署Spring Web应用程序时出现此错误：
"org.apache.kafka.common.errors.SaslAuthenticationException: An error: (java.security.PrivilegedActionException: javax.security.sasl.SaslException: User name could not be obtained [Caused by javax.security.auth.callback.UnsupportedCallbackException: Unrecognized SASL ClientCallback]) occurred when evaluating SASL token received from the Kafka Broker. Kafka Client will go to AUTHENTICATION_FAILED state.
Caused by: javax.security.sasl.SaslException: User name could not be obtained
at org.apache.kafka.common.security.scram.ScramSaslClient.evaluateChallenge(ScramSaslClient.java:105)
at org.apache.kafka.common.security.authenticator.SaslClientAuthenticator$2.run(SaslClientAuthenticator.java:361)
at org.apache.kafka.common.security.authenticator.SaslClientAuthenticator$2.run(SaslClientAuthenticator.java:359)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.kafka.common.security.authenticator.SaslClientAuthenticator.createSaslToken(SaslClientAuthenticator.java:359)
at org.apache.kafka.common.security.authenticator.SaslClientAuthenticator.sendSaslClientToken(SaslClientAuthenticator.java:269)
at org.apache.kafka.common.security.authenticator.SaslClientAuthenticator.authenticate(SaslClientAuthenticator.java:206)
at org.apache.kafka.common.network.KafkaChannel.prepare(KafkaChannel.java:81)
at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:486)
at org.apache.kafka.common.network.Selector.poll(Selector.java:424)
at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:460)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:261)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:233)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:224)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.awaitMetadataUpdate(ConsumerNetworkClient.java:156)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureCoordinatorReady(AbstractCoordinator.java:228)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureCoordinatorReady(AbstractCoordinator.java:205)
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:279)
at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1149)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1115)
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:699)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.security.auth.callback.UnsupportedCallbackException: Unrecognized SASL ClientCallback
at org.apache.kafka.common.security.authenticator.SaslClientCallbackHandler.handle(SaslClientCallbackHandler.java:89)
at org.apache.kafka.common.security.scram.ScramSaslClient.evaluateChallenge(ScramSaslClient.java:103)
... 24 common frames omitted
解决问题的唯一方法是重新启动Tomcat。
我正在使用“ sasl.jaas.config”作为动态属性。这里是如何配置spring kafka的：
@Bean
public KafkaTemplate<String, String> kafkaTemplate() {
Map<String, Object> props = new HashMap<>();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, env.getProperty("kafka.bootstrap.address"));
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
//enables GZIP compression
props.put(ProducerConfig.COMPRESSION_TYPE_CONFIG, env.getProperty("kafka.compression.type"));
//enables SSL and password based authentication
props.put(AdminClientConfig.SECURITY_PROTOCOL_CONFIG, env.getProperty("kafka.security.protocol"));
props.put(SaslConfigs.SASL_MECHANISM, env.getProperty("kafka.sasl.mechanism"));
props.put("sasl.jaas.config", String.format("org.apache.kafka.common.security.scram.ScramLoginModule required username=\"%s\" password=\"%s\";", env.getProperty("kafka.producer.username"), env.getProperty("kafka.producer.password")));
return new KafkaTemplate<String, String>(new DefaultKafkaProducerFactory<>(props));
}
如果在tomcat服务器上部署了第二个spring kafka Web应用程序，则会遇到相同的错误。我的解决方案定义了2个Web应用程序：
，但只有第一个部署的服务器运行良好。
有什么想法吗？