Todor Markov Todor Markov - 8 days ago 6
Java Question

Importing my jar to spark shell

I have a simple scala maven module which is part of a larger project (I created it as described here: https://www.jetbrains.com/help/idea/2016.2/creating-a-maven-module.html):

package com.myorg.simplr

import [...]

@SerialVersionUID(100L)
case class Simplr (){
//class code
}


I am trying to use this class in spark shell, so I built a jar file "simplr-1.0.jar" and launched the spark shell with --jars simplr-1.0.jar.

Then, when I try to import, I get the following

scala> import com.myorg.simplr.Simplr
<console>:25: error: object myorg is not a member of package com
import com.myorg.simplr.Simplr
^


How can I make the import to work?

I used maven to build, and here's my pom.xml:

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>my-parent-project</artifactId>
<groupId>com.myorg</groupId>
<version>1.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>

<artifactId>simplr</artifactId>
<version>1.0</version>

<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.10</artifactId>
<version>1.6.0</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-mllib_2.10</artifactId>
<version>1.6.0</version>
<scope>provided</scope>
</dependency>
</dependencies>

</project>

Answer

Please make sure some below points it will works 1. start spark shell like ./spark-shell --jars jar_path 2. There is class file in jar under the same package which you import, open jar and check it. 3. After start spark go to http://localhost:4040/environment/ you jar will be in classpath entries or not.