Packaging multiple Flink jobs from a single IntelliJ project

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Packaging multiple Flink jobs from a single IntelliJ project

Manas Kale
Hi,
I have an IntelliJ project that has multiple classes with main() functions. I want to package this project as a JAR that I can submit to the Flink cluster and specify the entry class when I start the job. Here are my questions:
  • I am not really familiar with Maven and would appreciate some pointers/examples. From what I understand, I will need to use some sort of transformer in the Maven shade plugin to merge all of the classes. If this is correct, can I see a small example? 
  • Also, I can't get a single main class working:

<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>flink_summarization</groupId>
<artifactId>flink_summarization</artifactId>
<version>0.1</version>
<packaging>jar</packaging>

<name>Flink Quickstart Job</name>
<url>http://www.myorganization.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<flink.version>1.10.1</flink.version>
<java.version>1.8</java.version>
<scala.binary.version>2.11</scala.binary.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
</properties>

<repositories>
<repository>
<id>apache.snapshots</id>
<name>Apache Development Snapshot Repository</name>
<url>https://repository.apache.org/content/repositories/snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>

<dependencies>
<!-- Apache Flink dependencies -->
<!-- These dependencies are provided, because they should not be packaged into the JAR file. -->
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-jdbc -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-kafka_2.11</artifactId>
<version>${flink.version}</version>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-state-processor-api_2.11</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-jdbc_2.11</artifactId>
<version>1.11.0</version>
</dependency>

<!-- Add logging framework, to produce console output when running in the IDE. -->
<!-- These dependencies are excluded from the application JAR by default. -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.7</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
<scope>runtime</scope>
</dependency>

<!-- Test dependencies-->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-test-utils_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-runtime_2.11</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_2.11</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<!-- use 2.9.1 for Java 7 projects -->
<version>3.16.1</version>
<scope>test</scope>
</dependency>


</dependencies>

<build>
<plugins>

<!-- Java Compiler -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>

<!-- We use the maven-shade plugin to create a fat jar that contains all necessary dependencies. -->
<!-- Change the value of <mainClass>...</mainClass> if your program entry point changes. -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<!-- author = Manas - dependencyReducedPOM was disabled to stop maven from entering an infinite loop -->
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<!-- Run shade goal on package phase -->
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>org.apache.flink:force-shading</exclude>
<exclude>com.google.code.findbugs:jsr305</exclude>
<exclude>org.slf4j:*</exclude>
<exclude>log4j:*</exclude>
</excludes>
</artifactSet>
<filters>
<filter>
<!-- Do not copy the signatures in the META-INF folder.
Otherwise, this might cause SecurityExceptions when using the JAR. -->
<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.ManifestResourceTransformer">
<mainClass>iu.feature_summarization.basic_features.pre.BasicPreProcessJob</mainClass>
</transformer>

</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>

<pluginManagement>
<plugins>

<!-- This improves the out-of-the-box experience in Eclipse by resolving some warnings. -->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<versionRange>[3.0.0,)</versionRange>
<goals>
<goal>shade</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<versionRange>[3.1,)</versionRange>
<goals>
<goal>testCompile</goal>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>

<!-- This profile helps to make things run out of the box in IntelliJ -->
<!-- Its adds Flink's core classes to the runtime class path. -->
<!-- Otherwise they are missing in IntelliJ, because the dependency is 'provided' -->
<profiles>
<profile>
<id>add-dependencies-for-IDEA</id>

<activation>
<property>
<name>idea.version</name>
</property>
</activation>

<dependencies>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>compile</scope>
</dependency>
</dependencies>
</profile>
</profiles>

</project>

The fully qualified name within tag <mainClass> is correct and contains the main() method. However, when I submit this to Flink I get the error:
> ../../flink-1.11.0/bin/flink run target/flink_summarization-0.1.jar

------------------------------------------------------------
The program finished with the following exception:

org.apache.flink.client.program.ProgramInvocationException: The program's entry point class '
iu.feature_summarization.basic_features.pre.BasicPreProcessJob' was not found in the jar file
.

Am I specifying some <scope> tag incorrectly in my pom file?


Thank you,
Manas
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Re: Packaging multiple Flink jobs from a single IntelliJ project

Manas Kale
Hi,
I solved my second issue - I was not following Maven's convention for placing source code (I had not placed my source in src/main/java).
However, I still would like some help with my first question - what is the recommended way to set a project with multiple main() classes? At the end, I would like to be able to run each main() class as a separate job. Should I create a single JAR and specify different entrypoint classes each time or should I create separate JARs for each main() class?

On Mon, Aug 31, 2020 at 11:13 AM Manas Kale <[hidden email]> wrote:
Hi,
I have an IntelliJ project that has multiple classes with main() functions. I want to package this project as a JAR that I can submit to the Flink cluster and specify the entry class when I start the job. Here are my questions:
  • I am not really familiar with Maven and would appreciate some pointers/examples. From what I understand, I will need to use some sort of transformer in the Maven shade plugin to merge all of the classes. If this is correct, can I see a small example? 
  • Also, I can't get a single main class working:

<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>flink_summarization</groupId>
<artifactId>flink_summarization</artifactId>
<version>0.1</version>
<packaging>jar</packaging>

<name>Flink Quickstart Job</name>
<url>http://www.myorganization.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<flink.version>1.10.1</flink.version>
<java.version>1.8</java.version>
<scala.binary.version>2.11</scala.binary.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
</properties>

<repositories>
<repository>
<id>apache.snapshots</id>
<name>Apache Development Snapshot Repository</name>
<url>https://repository.apache.org/content/repositories/snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>

<dependencies>
<!-- Apache Flink dependencies -->
<!-- These dependencies are provided, because they should not be packaged into the JAR file. -->
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-jdbc -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-kafka_2.11</artifactId>
<version>${flink.version}</version>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-state-processor-api_2.11</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-jdbc_2.11</artifactId>
<version>1.11.0</version>
</dependency>

<!-- Add logging framework, to produce console output when running in the IDE. -->
<!-- These dependencies are excluded from the application JAR by default. -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.7</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
<scope>runtime</scope>
</dependency>

<!-- Test dependencies-->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-test-utils_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-runtime_2.11</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_2.11</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<!-- use 2.9.1 for Java 7 projects -->
<version>3.16.1</version>
<scope>test</scope>
</dependency>


</dependencies>

<build>
<plugins>

<!-- Java Compiler -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>

<!-- We use the maven-shade plugin to create a fat jar that contains all necessary dependencies. -->
<!-- Change the value of <mainClass>...</mainClass> if your program entry point changes. -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<!-- author = Manas - dependencyReducedPOM was disabled to stop maven from entering an infinite loop -->
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<!-- Run shade goal on package phase -->
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>org.apache.flink:force-shading</exclude>
<exclude>com.google.code.findbugs:jsr305</exclude>
<exclude>org.slf4j:*</exclude>
<exclude>log4j:*</exclude>
</excludes>
</artifactSet>
<filters>
<filter>
<!-- Do not copy the signatures in the META-INF folder.
Otherwise, this might cause SecurityExceptions when using the JAR. -->
<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.ManifestResourceTransformer">
<mainClass>iu.feature_summarization.basic_features.pre.BasicPreProcessJob</mainClass>
</transformer>

</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>

<pluginManagement>
<plugins>

<!-- This improves the out-of-the-box experience in Eclipse by resolving some warnings. -->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<versionRange>[3.0.0,)</versionRange>
<goals>
<goal>shade</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<versionRange>[3.1,)</versionRange>
<goals>
<goal>testCompile</goal>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>

<!-- This profile helps to make things run out of the box in IntelliJ -->
<!-- Its adds Flink's core classes to the runtime class path. -->
<!-- Otherwise they are missing in IntelliJ, because the dependency is 'provided' -->
<profiles>
<profile>
<id>add-dependencies-for-IDEA</id>

<activation>
<property>
<name>idea.version</name>
</property>
</activation>

<dependencies>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>compile</scope>
</dependency>
</dependencies>
</profile>
</profiles>

</project>

The fully qualified name within tag <mainClass> is correct and contains the main() method. However, when I submit this to Flink I get the error:
> ../../flink-1.11.0/bin/flink run target/flink_summarization-0.1.jar

------------------------------------------------------------
The program finished with the following exception:

org.apache.flink.client.program.ProgramInvocationException: The program's entry point class '
iu.feature_summarization.basic_features.pre.BasicPreProcessJob' was not found in the jar file
.

Am I specifying some <scope> tag incorrectly in my pom file?


Thank you,
Manas
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Open this post in threaded view
|

Re: Packaging multiple Flink jobs from a single IntelliJ project

Manas Kale
Guess I figured out a solution for the first question as well - I am packaging multiple main() classes in the same JAR and specifying entrypoint classes when submitting the JAR. Most of my issues stemmed from an improperly configured POM file and a mismatch in Flink runtime versions.
I'll assume this is the recommended way to go about doing this, thanks for reading and have a great day!

On Mon, Aug 31, 2020 at 12:03 PM Manas Kale <[hidden email]> wrote:
Hi,
I solved my second issue - I was not following Maven's convention for placing source code (I had not placed my source in src/main/java).
However, I still would like some help with my first question - what is the recommended way to set a project with multiple main() classes? At the end, I would like to be able to run each main() class as a separate job. Should I create a single JAR and specify different entrypoint classes each time or should I create separate JARs for each main() class?

On Mon, Aug 31, 2020 at 11:13 AM Manas Kale <[hidden email]> wrote:
Hi,
I have an IntelliJ project that has multiple classes with main() functions. I want to package this project as a JAR that I can submit to the Flink cluster and specify the entry class when I start the job. Here are my questions:
  • I am not really familiar with Maven and would appreciate some pointers/examples. From what I understand, I will need to use some sort of transformer in the Maven shade plugin to merge all of the classes. If this is correct, can I see a small example? 
  • Also, I can't get a single main class working:

<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>flink_summarization</groupId>
<artifactId>flink_summarization</artifactId>
<version>0.1</version>
<packaging>jar</packaging>

<name>Flink Quickstart Job</name>
<url>http://www.myorganization.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<flink.version>1.10.1</flink.version>
<java.version>1.8</java.version>
<scala.binary.version>2.11</scala.binary.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
</properties>

<repositories>
<repository>
<id>apache.snapshots</id>
<name>Apache Development Snapshot Repository</name>
<url>https://repository.apache.org/content/repositories/snapshots/</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>

<dependencies>
<!-- Apache Flink dependencies -->
<!-- These dependencies are provided, because they should not be packaged into the JAR file. -->
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-jdbc -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-kafka_2.11</artifactId>
<version>${flink.version}</version>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-state-processor-api_2.11</artifactId>
<version>${flink.version}</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-jdbc_2.11</artifactId>
<version>1.11.0</version>
</dependency>

<!-- Add logging framework, to produce console output when running in the IDE. -->
<!-- These dependencies are excluded from the application JAR by default. -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.7</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
<scope>runtime</scope>
</dependency>

<!-- Test dependencies-->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-test-utils_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-runtime_2.11</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_2.11</artifactId>
<version>${flink.version}</version>
<scope>test</scope>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<!-- use 2.9.1 for Java 7 projects -->
<version>3.16.1</version>
<scope>test</scope>
</dependency>


</dependencies>

<build>
<plugins>

<!-- Java Compiler -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>

<!-- We use the maven-shade plugin to create a fat jar that contains all necessary dependencies. -->
<!-- Change the value of <mainClass>...</mainClass> if your program entry point changes. -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<!-- author = Manas - dependencyReducedPOM was disabled to stop maven from entering an infinite loop -->
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<!-- Run shade goal on package phase -->
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>org.apache.flink:force-shading</exclude>
<exclude>com.google.code.findbugs:jsr305</exclude>
<exclude>org.slf4j:*</exclude>
<exclude>log4j:*</exclude>
</excludes>
</artifactSet>
<filters>
<filter>
<!-- Do not copy the signatures in the META-INF folder.
Otherwise, this might cause SecurityExceptions when using the JAR. -->
<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.ManifestResourceTransformer">
<mainClass>iu.feature_summarization.basic_features.pre.BasicPreProcessJob</mainClass>
</transformer>

</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>

<pluginManagement>
<plugins>

<!-- This improves the out-of-the-box experience in Eclipse by resolving some warnings. -->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<versionRange>[3.0.0,)</versionRange>
<goals>
<goal>shade</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<versionRange>[3.1,)</versionRange>
<goals>
<goal>testCompile</goal>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore/>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>

<!-- This profile helps to make things run out of the box in IntelliJ -->
<!-- Its adds Flink's core classes to the runtime class path. -->
<!-- Otherwise they are missing in IntelliJ, because the dependency is 'provided' -->
<profiles>
<profile>
<id>add-dependencies-for-IDEA</id>

<activation>
<property>
<name>idea.version</name>
</property>
</activation>

<dependencies>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java_${scala.binary.version}</artifactId>
<version>${flink.version}</version>
<scope>compile</scope>
</dependency>
</dependencies>
</profile>
</profiles>

</project>

The fully qualified name within tag <mainClass> is correct and contains the main() method. However, when I submit this to Flink I get the error:
> ../../flink-1.11.0/bin/flink run target/flink_summarization-0.1.jar

------------------------------------------------------------
The program finished with the following exception:

org.apache.flink.client.program.ProgramInvocationException: The program's entry point class '
iu.feature_summarization.basic_features.pre.BasicPreProcessJob' was not found in the jar file
.

Am I specifying some <scope> tag incorrectly in my pom file?


Thank you,
Manas
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Re: Packaging multiple Flink jobs from a single IntelliJ project

Flavio Pompermaier
Yes, the recommended way to proceed in your use case is to put all classes in a single JAR and to specify the main class to run to the flink client. 

Best,
Flavio