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Cannot run jar in shell

I am having problem running a jar from shell command as i keep on getting "could not find or load main class error"
After dropping the jar file into my server. I execute following command
java -jar mapr.jar
But i get an error saying - could not find or load main class
Below is my project structure -
mapreduce (projectname)
--src/main/java
--mapreduce (packagename)
--Map.java
--ZipProcessor.java (main Class)
and my POM.xml file -
<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.project.hadoop</groupId>
<artifactId>mapreduce</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>MapReduce</name>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-mapreduce-client-common</artifactId>
<version>2.5.0</version>
</dependency>
</dependencies>
<build>
<finalName>mapr</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<mainClass>ZipProcessor</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
I got my problem resolved using below plugin
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>
com.application.ZipProcessor
</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
</plugin>

<manifest>
<mainClass>ZipProcessor</mainClass>
</manifest>
The above declaration of your main class should be done including package name and the class name.
If your package name is com.test.processor and your class name is App then the above declaration of main class should be as below :
<manifest>
<mainClass>com.test.processor.App</mainClass>
</manifest>
Hope this resolves your issue.

How to create a fat jar?

With SpringBoot, you have the #SpringBootApplication annotation, but what is the equivalent with the neat Java Spark framework?
IntelliJ creates a Maven project and I added the spark dependency, but running the install goal, I get a 5 KB jar with no manifest. Not an executable jar.
The pom.xml created thus far is as follows:
<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>sparkdemo</groupId>
<artifactId>sparkdemo</artifactId>
<version>1.0 </version>
<packaging>jar</packaging>
<name>sparkdemo</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.sparkjava</groupId>
<artifactId>spark-core</artifactId>
<version>2.5.4</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<optimize>true</optimize>
<debug>true</debug>
</configuration>
</plugin>
</plugins>
</build>
</project>
Would appreciate any suggestions....Thanks!

What you need here is an executable jar that will not only contain your classes, but also classes from all your dependencies.
For that you can use the Maven Assembly Plugin.
See the sample code below.
<project>
[...]
<build>
[...]
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>org.sample.App</mainClass> // specify your main class here
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id> <!-- this is used for inheritance merges -->
<phase>package</phase> <!-- bind to the packaging phase -->
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
[...]
</project>
Then, run mvn package and the executable jar should be located in the folder target (with a name like ProjectName-1.0-SNAPSHOT-jar-with-dependencies.jar).

Looks like you are looking for maven assembly plugin
Add this in the plugin section and run mvn package
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>assemble-all</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>

Combine java code and dependencies into one jar (executable jar) using maven

I'm trying to compile my src into one jar file with Netbeans. I currently compile via the right click Build with Dependecies. Here is my pom file
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>ca.osmcanada</groupId>
<artifactId>OSVUploadr</artifactId>
<version>0.1-ALPHA</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>com.github.scribejava</groupId>
<artifactId>scribejava-apis</artifactId>
<version>2.8.1</version>
</dependency>
<dependency>
<groupId>com.drewnoakes</groupId>
<artifactId>metadata-extractor</artifactId>
<version>2.9.1</version>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifest>
<mainClass>ca.osmcanada.osvuploadr.JFMain</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.6</version>
<configuration>
<archive>
<manifest>
<mainClass>ca.osmcanada.osvuploadr.JFMain</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<executions>
<execution>
<id>make-assembly</id> <!-- this is used for inheritance merges -->
<phase>package</phase> <!-- bind to the packaging phase -->
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</configuration>
</plugin>
</plugins>
</build>
</project>
When I execute the output jar file it can't find the com.github.scribejava and com.drewnoakes libraries. Also if I don't use the maven-jar-plugin the main class doesnt get added to the meta-inf/manifest.mf. What exactly am I doing wrong?

Put the execution tag outside configuration tag for maven-assembly-plugin, like below:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.6</version>
<configuration>
<archive>
<manifest>
<mainClass>ca.osmcanada.osvuploadr.JFMain</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>

Why am I getting this Maven error?

I've been trying to fix this problem for a good part of an hour now, and I haven't gotten anywhere.
When I attempt to compile my project using Maven, I get this error:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5:single (default-cli) on project GankALane: Unable to parse configuration of mojo org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5:single for parameter archive: Cannot find setter, adder nor field in org.apache.maven.archiver.MavenArchiveConfiguration for 'descriptorRefs'
I'm compiling by using the command:
mvn clean compile assembly:single
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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.me</groupId>
<artifactId>GankALane</artifactId>
<version>1.0-SNAPSHOT</version>
<repositories>
<repository>
<id>beam-releases</id>
<url>https://maven.beam.pro/content/repositories/releases/</url>
</repository>
<repository>
<id>beam-snapshots</id>
<url>https://maven.beam.pro/content/repositories/snapshots/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>pro.beam</groupId>
<artifactId>api</artifactId>
<version>1.10.5-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>pro.beam</groupId>
<artifactId>interactive</artifactId>
<version>1.5.0-SNAPSHOT</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.me.GankALane.Main</mainClass>
</manifest>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Thanks for looking, and hopefully I can find a solution!

Your POM is wrong:
<configuration>
<archive>
...
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</archive>
</configuration>
The message gives the hint:
parameter archive: Cannot find setter, adder nor field ... for 'descriptorRefs'
See Apache Maven Assembly Plugin > Usage:
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
which also links to Apache Maven Archiver at the beginning: no <archive>/<descriptorRefs> there.

Class Not Found Exception for a Maven Jar

I use maven to manage dependency in my project. This is my pom.xml
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.prasanna</groupId>
<artifactId>fft-java</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>
<name>fft-java</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>com.github.wendykierp</groupId>
<artifactId>JTransforms</artifactId>
<version>3.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<!-- Build an executable JAR -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>com.prasanna.TestFFT</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
I have only one java class in my application. When I run my class from my application, it runs as expected. Whereas if I make a mvn package and try to run it from the terminal as java -jar test-fft.jar, I get a java.lang.ClassNotFoundException: org.jtransforms.fft.DoubleFFT_2D
But this DoubleFFT_2D is a part of JTransforms dependency that I have added. How would I run this jar?

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>Mydir/lib</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<outputDirectory>MyDir</outputDirectory>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib</classpathPrefix>
<mainClass>com.test.entryClassOfJarHavingMainMethod</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
Use these configuration in pom.xml to create jar with lib folder and package as a jar

use the maven-assembly plugin to build the jar with dependency.
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>