我正在尝试在IDE中以Scala代码访问alluxio中的文件,并且出现此错误Exception in thread "main" java.io.IOException: No FileSystem for scheme: alluxio
我的代码如下,
package com.example.sparkalliuxiodemo
import org.apache.spark.sql.SparkSession
object TestMain {
def main(args: Array[String]): Unit = {
val spark = SparkSession.builder().config("spark.master", "local[2]")
.getOrCreate()
var df = spark.read.parquet("alluxio://localhost:19998/sample-df")
df.printSchema()
}
}
pom.xml:
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>spark-alluxio-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.12</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.12</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>org.alluxio</groupId>
<artifactId>alluxio-core-client</artifactId>
<version>1.8.1</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.alluxio</groupId>
<artifactId>alluxio-core-server</artifactId>
<version>1.8.1</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.alluxio</groupId>
<artifactId>alluxio-core-common</artifactId>
<version>1.8.1</version>
</dependency>
<dependency>
<groupId>org.alluxio</groupId>
<artifactId>alluxio-core-client-fs</artifactId>
<version>1.8.1</version>
</dependency>
</dependencies>
</project>
我能够通过Shell访问Spark Installed目录中的alluxio文件系统。如果我尝试通过IDE访问同一文件,包括POM.xml中的上述alluxio依赖项,则会收到上述错误。
如果将这个jar`alluxio-1.8.1-client.jar'手动放置到我的构建路径中,我将能够在alluxio中访问文件,而IDE本身没有任何错误。
我需要直接在eclipse或scala-ide中访问alluxio中的文件。
有人可以建议我将正确的alluxio依赖项包含在maven依赖项中吗?
答案 0 :(得分:1)
尝试添加
<dependency>
<groupId>org.alluxio</groupId>
<artifactId>alluxio-core-client-hdfs</artifactId>
<version>1.8.1</version>
</dependency>