maven - NoClassDefFoundError: org/json/JSONObject - Hadoop MapReduce -

i'm trying mapreduce job using json input. imported json dependency in pom.xml , maven clean install run properly. when run jar in hadoop "noclassdeffounderror: org/json/jsonobject" error on mapper class. (i tried json java external jar, doesn't work.

this test mapper class:

package com.andrew.hadoopnba.nbajob1;  import java.io.ioexception;  import org.apache.hadoop.io.intwritable; import org.apache.hadoop.io.text; import org.apache.hadoop.mapreduce.mapper; import org.json.*;    public class pointsrankingmapper    extends mapper<object, text, text, intwritable> {      public void map(object key, text value, context context)         throws ioexception, interruptedexception {         try {              jsonobject jsn = new jsonobject(value.tostring());             system.out.println("printing json " + jsn);          } catch (exception e) {             // todo auto-generated catch block             e.printstacktrace();         }     } } 

and maven dependency:

<dependency>     <groupid>org.json</groupid>     <artifactid>json</artifactid>     <version>20140107</version> </dependency> 

any ideas?

you can use jackson process json.

<repositories>     <repository>         <id>codehaus</id>         <url>http://repository.codehaus.org/org/codehaus</url>     </repository>   </repositories>    <dependencies>     <dependency>         <groupid>org.codehaus.jackson</groupid>         <artifactid>jackson-mapper-asl</artifactid>         <version>1.8.5</version>     </dependency>   </dependencies> 

or google's gson

<dependency>     <groupid>com.google.code.gson</groupid>     <artifactid>gson</artifactid>     <version>1.7.1</version> </dependency>