为什么spark-submit会失败并显示“无法为数据源加载类：org.apache.spark.sql.cassandra”？在--jars中使用Cassandra连接器？ [英] Why does spark-submit fail with "Failed to load class for data source: org.apache.spark.sql.cassandra" with Cassandra connector in --jars?

问题描述

Spark版本：1.4.1

Spark version: 1.4.1

Cassandra版本：2.1.8

Cassandra Version: 2.1.8

Datastax Cassandra连接器：1.4 .2-SNAPSHOT.jar

Datastax Cassandra Connector: 1.4.2-SNAPSHOT.jar

我运行的命令

./ spark-提交--jars /usr/local/src/spark-cassandra-connector/spark-cassandra-connector-java/target/scala-2.10/spark-cassandra-connector-java-assembly-1.4.2-SNAPSHOT.jar-驱动程序类路径/usr/local/src/spark-cassandra-connector/spark-cassandra-connector-java/target/scala-2.10/spark-cassandra-connector-java-assembly-1.4.2-SNAPSHOT.jar- -jars /usr/local/lib/spark-1.4.1/external/kafka/target/scala-2.10/spark-streaming-kafka_2.10-1.4.1.jar --jars / usr / local / lib / spark- 1.4.1 / external / kafka-assembly / target / scala-2.10 / spark-streaming-kafka-assembly_2.10-1.4.1.jar --driver-class-path /usr/local/lib/spark-1.4.1 /external/kafka/target/scala-2.10/spark-streaming-kafka_2.10-1.4.1.jar --driver-class-path /usr/local/lib/spark-1.4.1/external/kafka-assembly/ target / scala-2.10 / spark-streaming-kafka-as sembly_2.10-1.4.1.jar-包org.apache.spark：spark-streaming-kafka_2.10：1.4.1 --executor内存6g --executor-cores 6 --master local [4] kafka_streaming。 py

./spark-submit --jars /usr/local/src/spark-cassandra-connector/spark-cassandra-connector-java/target/scala-2.10/spark-cassandra-connector-java-assembly-1.4.2-SNAPSHOT.jar --driver-class-path /usr/local/src/spark-cassandra-connector/spark-cassandra-connector-java/target/scala-2.10/spark-cassandra-connector-java-assembly-1.4.2-SNAPSHOT.jar --jars /usr/local/lib/spark-1.4.1/external/kafka/target/scala-2.10/spark-streaming-kafka_2.10-1.4.1.jar --jars /usr/local/lib/spark-1.4.1/external/kafka-assembly/target/scala-2.10/spark-streaming-kafka-assembly_2.10-1.4.1.jar --driver-class-path /usr/local/lib/spark-1.4.1/external/kafka/target/scala-2.10/spark-streaming-kafka_2.10-1.4.1.jar --driver-class-path /usr/local/lib/spark-1.4.1/external/kafka-assembly/target/scala-2.10/spark-streaming-kafka-assembly_2.10-1.4.1.jar --packages org.apache.spark:spark-streaming-kafka_2.10:1.4.1 --executor-memory 6g --executor-cores 6 --master local[4] kafka_streaming.py

以下是我遇到的错误：

Py4JJavaError: An error occurred while calling o169.save.
: java.lang.RuntimeException: Failed to load class for data source: org.apache.spark.sql.cassandra

必须做一些愚蠢的事情。任何响应将不胜感激。

Must be doing something silly. Any response will be appreciated.

推荐答案

请尝试在同一--jars选项中提供所有jar（逗号分隔）：

Try to provide all your jars in the same --jars option (comma-separated) :

--jars yourFirstJar.jar,yourSecondJar.jar

一个更方便的开发解决方案是使用Maven Central的jar（以逗号分隔）：

A more convenient solution for development purpose would be to use the jars from maven central (comma-separated) :

--packages org.apache.spark:spark-streaming-kafka_2.10:1.4.1,com.datastax.spark:spark-cassandra-connector_2.10:1.4.1

这篇关于为什么spark-submit会失败并显示“无法为数据源加载类：org.apache.spark.sql.cassandra”？在--jars中使用Cassandra连接器？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！