spring boot 由2.6升级2.7 kafka报错问题汇总

1. Cannot execute transactional method because we are in an error state Caused by: org.apache.kafka.common.errors.ClusterAuthorizationException: Cluster authorization failed.

原因

sercurity.protocol 不全局化

解决方案

spring:
  kafka:
    bootstrap-servers: 
    properties:
      security.protocol: SASL_PLAINTEXT
      sasl.mechanism: SCRAM-SHA-256
      sasl.jaas.config: org.apache.kafka.common.security.scram.ScramLoginModule required username="" password="";

改动为 ->

spring:
  kafka:
    bootstrap-servers: 
    producer:
      acks: 1
      security:
        protocol: SASL_PLAINTEXT
    properties:
      sasl.mechanism: SCRAM-SHA-256
      sasl.jaas.config: org.apache.kafka.common.security.scram.ScramLoginModule required username="" password="";

2. No transaction is in process; possible solutions: run the template operation within the scope of a template.executeInTransaction() operation, start a transaction with @Transactional before invoking the template method, run in a transaction started by a listener container when consuming a record

解决方案

在方法上加@Transactional注解 
配置生产者 transaction-id-prefix:

3. Must set acks to all in order to use the idempotent producer. Otherwise we cannot guarantee idempotence.

解决方案

应答级别:多少个分区副本备份完成时向生产者发送ack确认(可选0、1、all/-1)
spring.kafka.producer.acks=-1

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