Unable to run a Spark Java Program - hadoop

Question

I am running a Spark Program written in java & I am using the sample wordcount example.
I have created a jar file but, when I am submitting the spark job it is throwing an error.
$ spark-submit --class WordCount --master local \ home/cloudera/workspace/sparksample/target/sparksample-0.0.1-SNAPSHOT.jar
I am getting the below error
java.lang.ClassNotFoundException: wordCount
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at org.apache.spark.util.Utils$.classForName(Utils.scala:175)
at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:689)
at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:181)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Edited
i am also adding my pom.xml so that you can help.
<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.igi.sparksample</groupId>
<artifactId>sparksample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency> <!-- Spark dependency -->
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.10</artifactId>
<version>1.6.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-client</artifactId>
<version>2.6.0</version>
</dependency>
</dependencies>
</project>

Answer 1

After trying so many combinations and doing a bit R&D i solved my issue.
Issue was in my spark submit command i changed it to this
spark-submit --class com.xxx.sparksample.WordCount --master local /home/cloudera/workspace/sparksample/target/sparksample-0.0.1-SNAPSHOT.jar
and it worked.

Answer 2

It can't find the WordCount class. You probably need to include the package that class is in, so you have the full classpath, ie:
--class <PACKAGE>.WordCount

Answer 3

The error you posted doesn't show any problem with Spark.
However, you must have a typo in your program. Java threw a ClassNotFoundException looking for wordCount, where it should most probably be WordCount, with a capital W.
Please check the names of your classes and your imports.

Answer 4

Make sure that the name of class (wordcount or WordCount or whatever...) that you pass to spark-submit is exactly similar to what you have defined.
Make sure that packaging is correct.
To verify, open/extract your jar and see the class name and the package hierarchy.