Java 8与Spark 3.2.0兼容的com.datastax.oss版本及依赖问题咨询
问题分析与解决方案
问题背景
- 需确认Java 8、Spark 3.2.0兼容的com.datastax.oss版本
- 不明确Spark与Spring Boot的兼容关系
- 通过Spark查询Cassandra时抛出
NoClassDefFoundError错误
错误堆栈信息
java.lang.NoClassDefFoundError: com/datastax/oss/driver/internal/core/util/collection/SimpleQueryPlan at com.datastax.spark.connector.cql.LocalNodeFirstLoadBalancingPolicy.newQueryPlan(LocalNodeFirstLoadBalancingPolicy.scala:122) ~[spark-cassandra-connector-driver_2.12-3.2.0.jar:3.2.0] at com.datastax.oss.driver.internal.core.metadata.LoadBalancingPolicyWrapper.newQueryPlan(LoadBalancingPolicyWrapper.java:155) ~[java-driver-core-4.9.0.jar:na] at com.datastax.oss.driver.internal.core.cql.CqlRequestHandler.onThrottleReady(CqlRequestHandler.java:211) ~[java-driver-core-4.9.0.jar:na] at com.datastax.oss.driver.internal.core.session.throttling.PassThroughRequestThrottler.register(PassThroughRequestThrottler.java:52) ~[java-driver-core-4.9.0.jar:na]
当前Maven POM配置
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.4.0</version> <relativePath /> <!-- lookup parent from repository --> </parent> <groupId>com.valoores.cassandra</groupId> <artifactId>cassandra-spark</artifactId> <version>0.0.1-SNAPSHOT</version> <name>cassandra-spark</name> <description>datacrowd-cassandra</description> <properties> <java.version>8</java.version> </properties> <dependencies> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>5.4.0.Final</version> </dependency> <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20210307</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springdoc</groupId> <artifactId>springdoc-openapi-ui</artifactId> <version>1.6.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-cassandra</artifactId> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-core_2.12</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.datastax.spark</groupId> <artifactId>spark-cassandra-connector_2.12</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.datastax.spark</groupId> <artifactId>spark-cassandra-connector-driver_2.12</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-sql_2.12</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-core</artifactId> <version>4.9.0</version> </dependency> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-core-shaded</artifactId> <version>4.9.0</version> </dependency> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-query-builder</artifactId> <version>4.9.0</version> </dependency> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-mapper-runtime</artifactId> <version>4.9.0</version> </dependency> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-shaded-guava</artifactId> <version>25.1-jre</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>
问题根源
- 驱动版本不匹配:spark-cassandra-connector 3.2.0官方依赖的DataStax Java Driver版本为4.13.0,而你使用的4.9.0中不存在
SimpleQueryPlan类,该类是在4.10+版本中新增的,导致类找不到错误。 - 依赖冲突:同时引入
java-driver-core和java-driver-core-shaded会引发类加载冲突;另外spring-boot-starter-data-cassandra自带的DataStax驱动版本与手动引入的版本不一致,也会导致冲突。 - Spring Boot与Spark兼容性:Spring Boot 2.4.x和Spark 3.2.0是兼容的,两者均支持Java 8。
修复方案
1. 统一DataStax驱动版本
将所有com.datastax.oss依赖的版本改为4.13.0,同时:
- 移除
java-driver-core,仅保留java-driver-core-shaded(避免与Spark依赖的第三方库冲突) - 移除
java-driver-shaded-guava,因为shaded驱动已包含适配版本的Guava
2. 解决Spring Data Cassandra依赖冲突
通过Maven的dependencyManagement强制统一DataStax驱动版本,或者排除spring-boot-starter-data-cassandra自带的驱动依赖:
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-cassandra</artifactId> <exclusions> <exclusion> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-core</artifactId> </exclusion> <exclusion> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-query-builder</artifactId> </exclusion> </exclusions> </dependency>
3. 修正后的核心依赖示例
<!-- Spark相关依赖 --> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-core_2.12</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.datastax.spark</groupId> <artifactId>spark-cassandra-connector_2.12</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>com.datastax.spark</groupId> <artifactId>spark-cassandra-connector-driver_2.12</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>org.apache.spark</groupId> <artifactId>spark-sql_2.12</artifactId> <version>3.2.0</version> </dependency> <!-- DataStax驱动,统一为4.13.0 --> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-core-shaded</artifactId> <version>4.13.0</version> </dependency> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-query-builder</artifactId> <version>4.13.0</version> </dependency> <dependency> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-mapper-runtime</artifactId> <version>4.13.0</version> </dependency> <!-- Spring Data Cassandra,排除自带驱动 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-cassandra</artifactId> <exclusions> <exclusion> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-core</artifactId> </exclusion> <exclusion> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-query-builder</artifactId> </exclusion> </exclusions> </dependency>
版本兼容说明
- Java 8 + Spark 3.2.0 对应的DataStax Java Driver版本为4.13.0(spark-cassandra-connector 3.2.0官方指定版本)
- Spring Boot 2.4.x 与 Spark 3.2.0 兼容,两者均基于Java 8构建,无核心冲突
内容的提问来源于stack exchange,提问作者Nathalie
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