Submitting spring boot application jar to spark-submit

Question

I am pretty new to spark, and i am trying to try out spark submit. I created an application in spring boot , used mvn package to create a jar . But when i am trying to submit the jar to spark-submit , it is not able to find the Main class . But the main class is present in the jar.

 spark-submit --class com.dip.sparkapp.SparkappApplication --master local target/sparkapp-0.0.1-SNAPSHOT.jar

Answer 1

If your are using gradle this will work for shadow plugin:

import com.github.jengelman.gradle.plugins.shadow.transformers.*

...

plugins {
    id 'com.github.johnrengelman.shadow' version '2.0.4'
}

...

shadowJar {
    zip64 true
    mergeServiceFiles()
    append 'META-INF/spring.handlers'
    append 'META-INF/spring.schemas'
    append 'META-INF/spring.tooling'
    transform(PropertiesFileTransformer) {
        paths = ['META-INF/spring.factories' ]
        mergeStrategy = "append"
    }
}

Taken from here: https://github.com/spring-projects/spring-boot/issues/1828#issuecomment-607352468

Answer 2

We ran into the same problem, actually, on the same day you posted this. Our solutions was to use the shade plugin for maven to edit our build a bit. We found that when packaging with the spring-boot-maven plugin it nested our classes in BOOT-INF/classes which spark didn't like. I'll paste the relevant section so you can try it out on your own application -- good luck!

<build>
   <plugins>
      <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <version>${spring-boot-version}</version>
                </dependency>
            </dependencies>
            <configuration>
                <keepDependenciesWithProvidedScope>false</keepDependenciesWithProvidedScope>
                <createDependencyReducedPom>false</createDependencyReducedPom>
                <filters>
                    <filter>
                        <artifact>*:*</artifact>
                        <excludes>
                            <exclude>META-INF/*.SF</exclude>
                            <exclude>META-INF/*.DSA</exclude>
                            <exclude>META-INF/*.RSA</exclude>
                        </excludes>
                    </filter>
                </filters>
                <transformers>
                    <transformer
                            implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                        <resource>META-INF/spring.handlers</resource>
                    </transformer>
                    <transformer
                            implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
                        <resource>META-INF/spring.factories</resource>
                    </transformer>
                    <transformer
                            implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                        <resource>META-INF/spring.schemas</resource>
                    </transformer>
                    <transformer
                            implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
                    <transformer
                            implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                        <mainClass>${start-class}</mainClass>
                    </transformer>
                </transformers>
            </configuration>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>