带有 Spring Cassandra 的微服务不会故障转移到远程集群

Question

我设置了两个数据中心（DC1、DC2），每个数据中心有 3 个节点。一致性级别是 local_quorum，串行一致性级别是 LOCAL_SERIAL。本地数据中心是 DC1。当本地数据中心只有一个节点活着时，微服务不会自动故障转移到 DC2，而是一直抱怨“没有足够的副本可用于一致性查询 LOCAL_QUORUM（需要 2 个但只有 1 个活着”。任何建议都会不胜感激。

Maven 依赖项：

org.springframework.boot:spring-boot:jar:2.3.7.RELEASE
org.springframework.boot:spring-boot-starter-data-cassandra:jar:2.3.7.RELEASE
org.springframework.data:spring-data-cassandra:jar:3.0.6.RELEASE
com.datastax.oss:java-driver-core:4.10.0

YAML：

spring:
  data:
    cassandra:
      consistency-level: local_quorum
      serial-consistency-level: LOCAL_SERIAL
      local-datacenter: DC1
      other configs: ...

代码：

public class CassandraConfig {

    @Bean
    public CqlSessionBuilderCustomizer sessionBuilderConfigurer() {
        return cqlSessionBuilder ->
                cqlSessionBuilder
                        .withAuthCredentials("username", "pwd");
    }

    @Bean
    public DriverConfigLoaderBuilderCustomizer driverConfigLoaderBuilderCustomizer() {
        return loaderBuilder -> loaderBuilder
                .withDuration(DefaultDriverOption.REQUEST_TIMEOUT, Duration.ofMillis(10000))
                .withBoolean(DefaultDriverOption.LOAD_BALANCING_DC_FAILOVER_ALLOW_FOR_LOCAL_CONSISTENCY_LEVELS, true)
                .withInt(DefaultDriverOption.LOAD_BALANCING_DC_FAILOVER_MAX_NODES_PER_REMOTE_DC, 3);
    }
}