Question

我对简单的Spring Boot应用程序有疑问。我正在使用：

spring-boot-starter-parent
spring-boot-starter-data-cassandra
Cassandra 3.11.3（在CentOS 7服务器和本地Mac OS上）（通过cqlsh进行查询）

我遵循https://www.baeldung.com/spring-data-cassandra-tutorial中的简单指南，无论Cassandra是否正在运行启动时出现一个错误：

2018-11-25 09:12:34.581 ERROR 83213 --- [main] o.s.boot.SpringApplication: Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'session' defined in class path resource [some/project/path/CassandraConfig.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/codahale/metrics/JmxReporte

我的配置类：

@Configuration
@EnableCassandraRepositories(basePackages = "packagename")
public class CassandraConfig extends AbstractCassandraConfiguration {

    @Override
    protected String getKeyspaceName() {
        return "test";
    }

    @Bean
    public CassandraClusterFactoryBean cluster() {
        CassandraClusterFactoryBean cluster = new CassandraClusterFactoryBean();
        cluster.setContactPoints("127.0.0.1");
        cluster.setPort(9042);
        return cluster;
    }

    @Override
    public SchemaAction getSchemaAction() {
        return SchemaAction.CREATE_IF_NOT_EXISTS;
    }

    @Override
    public String[] getEntityBasePackages() {
        return new String[]{"packagename"};
    }
}

实体：

@Table
public class Image implements Serializable {

    @PrimaryKeyColumn(
        name = "key",
        ordinal = 0,
        type = PrimaryKeyType.PARTITIONED)
    private UUID id;

    @Column
    private Blob object;
}

存储库：

@Repository
public interface ImagesRepository extends CrudRepository<Image, UUID> {
}

Cassandra结构：

CREATE TABLE images (
    key text,
    object blob,
    PRIMARY KEY (key)
);

https://github.com/springframeworkguru/spring-boot-cassandra-example也给我一个关于创建bean的错误。

Answer 1

您缺少Dropwizard依赖性：

您需要metrics-core库作为依赖项：
<dependencies>
<dependency>
    <groupId>io.dropwizard.metrics</groupId>
    <artifactId>metrics-core</artifactId>
    <version>${metrics.version}</version>
</dependency>
  注意

确保在POM中声明了带有当前版本3.1.0的metrics.version属性。

春季启动Cassandra“在创建名称为'session'的bean时出错”

1 个答案: