Jersey JAVA REST Client giving Error 500 “BAD Request” for POST request, while POSTMAN is able POST to same SDC REST API

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I am trying to post form data through a JAVA Jersey REST client but i receive the response code 500 and an according exception:

java.lang.RuntimeException: Failed with HTTP error code : 500

The same request from POSTMAN(Chrome Extention) works successfully.

I am making a POST request to StreamSets Data Collector API.

My POM.xml is

   <?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.vijay</groupId>
<artifactId>mavenproject2</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
        <jersey.version>2.12</jersey.version>
<jersey.scope>compile</jersey.scope>
<compileSource>1.7</compileSource>
<maven.compiler.target>1.7</maven.compiler.target>
<maven.compiler.source>1.7</maven.compiler.source>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- Jersey core Servlet 2.x implementation -->
<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
    <version>${jersey.version}</version>
    <scope>${jersey.scope}</scope>
</dependency>

<!-- Jersey Multipart entity providers support module -->
<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-multipart</artifactId>
    <version>${jersey.version}</version>
    <scope>${jersey.scope}</scope>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.connectors</groupId>
<artifactId>jersey-apache-connector</artifactId>
<version>2.12</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

Below is my Code

import java.io.File;
import java.util.Base64;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.client.Client
import java.security.KeyManagementException
import java.security.NoSuchAlgorithmException;
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.media.multipart.FormDataMultiPart;
import org.glassfish.jersey.media.multipart.MultiPartFeature;
import org.glassfish.jersey.media.multipart.file.FileDataBodyPart;

public static String testUploadService(String httpURL, File filePath)  throws Exception {

// local variables
ClientConfig clientConfig = null;
Client client = null;
WebTarget webTarget = null;
Invocation.Builder invocationBuilder = null;
Response response = null;
FileDataBodyPart fileDataBodyPart = null;
FormDataMultiPart formDataMultiPart = null;
int responseCode;
String responseMessageFromServer = null;
String responseString = null;
  String name = "*******";
String password = "*******";
String authString = name + ":" + password;
String sdc="sdc";
byte[] encoding = Base64.getEncoder().encode(authString.getBytes());
byte[] encoding2 = Base64.getEncoder().encode(sdc.getBytes());
String USER_PASS = new String(encoding);
String auth2=new String(encoding2);

try{

    ClientConfig cc = new ClientConfig();
    cc.register(MultiPartFeature.class);

    try {
    client = new JerseywithSSL().initClient(cc);
    } catch (KeyManagementException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) { 
    e.printStackTrace();
    }
    webTarget = client.target(httpURL);

    // set file upload values
    fileDataBodyPart = new FileDataBodyPart("uploadFile", filePath, MediaType.MULTIPART_FORM_DATA_TYPE);
    formDataMultiPart = new FormDataMultiPart();
    formDataMultiPart.bodyPart(fileDataBodyPart);

    // invoke service
    invocationBuilder = webTarget.request();
              invocationBuilder.header("Authorization", "Basic " + USER_PASS);
              invocationBuilder.header("X-Requested-By","SDC"); //Additional Header requiered by Streamsets RestAPI
             invocationBuilder.header("Content-type", "multipart/form-data");
    response = invocationBuilder.post(Entity.entity(formDataMultiPart, MediaType.MULTIPART_FORM_DATA));

    // get response code
    responseCode = response.getStatus();
    System.out.println("Response code: " + responseCode);

    if (response.getStatus() != 200) {
        throw new RuntimeException("Failed with HTTP error code : " + responseCode);
    }

    // get response message ...