带有sbt + cassandra连接器依赖性问题的火花流

Question

各位，

我想把卡桑德拉和火花流结合起来。以下是sbt文件：

 scalaVersion := "2.11.8"

libraryDependencies ++= Seq(
"org.apache.spark" %% "spark-core" % "2.0.0" % "provided",
"org.apache.spark" %% "spark-streaming" % "2.0.0" % "provided",
"org.apache.spark" %% "spark-sql" % "1.6.1",
"com.datastax.spark" %% "spark-cassandra-connector" % "1.6.2",
"com.datastax.cassandra" % "cassandra-driver-core" % "3.0.0",
("org.apache.spark" %% "spark-streaming-kafka" % "1.6.0").
exclude("org.spark-project.spark", "unused")
)

我为cassandra集成添加了以下行(下面提到的错误行)：

val lines = KafkaUtils.createDirectStream[
String, String, StringDecoder, StringDecoder](
ssc, kafkaParams, topics)

//Getting errors once I add below line in program 
lines.saveToCassandra("test", "test", SomeColumns("key", "value"))

lines.print()

添加以上行后，在IDE中可以看到下面的错误：

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如果我试图从命令提示符中打包这个项目，我会看到类似的错误：

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​

FYR，我使用以下版本：

scala - 2.11

kafka - kafka_2.11-0.8.2.1

java -8

cassandra -datastax-社区-64位_2.2.8

请帮助解决这个问题。

Answer 1

正如预期的那样，通过更新sbt文件来解决依赖问题，如下所示：

scalaVersion := "2.11.8"

libraryDependencies ++= Seq(
"org.apache.spark" %% "spark-core" % "2.0.0" % "provided",
"org.apache.spark" %% "spark-streaming" % "2.0.0" % "provided",
"org.apache.spark" %% "spark-sql" % "2.0.0",
"com.datastax.spark" %% "spark-cassandra-connector" % "2.0.0-RC1",
"com.datastax.cassandra" % "cassandra-driver-core" % "3.0.0",
("org.apache.spark" %% "spark-streaming-kafka" % "1.6.0").
exclude("org.spark-project.spark", "unused")
)