Connection refused to HiveServer2 via JDBC

Replies: 8

Hi,

I am trying to connect to HiveServer2 via JDBC but I am getting “Connection refused” error.

org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused
at org.apache.thrift.transport.TSocket.open(TSocket.java:185)
at org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:248)
at org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
at org.apache.hive.jdbc.HiveConnection.openTransport(HiveConnection.java:156)
at org.apache.hive.jdbc.HiveConnection.(HiveConnection.java:96)
at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:104)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at TestClass.main(TestClass.java:21)
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at org.apache.thrift.transport.TSocket.open(TSocket.java:180)
… 8 more
Exception in thread “main” java.sql.SQLException: Could not establish connection to jdbc:hive2://localhost:10000/default: java.net.ConnectException: Connection refused
at org.apache.hive.jdbc.HiveConnection.openTransport(HiveConnection.java:159)
at org.apache.hive.jdbc.Hive
Connection.(HiveConnection.java:96)
at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:104)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at TestClass.main(TestClass.java:21)

Following is the java code which I am using. Am I doing something wrong?

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class TestClass {

public static void main(String[] args) throws Exception{

try {
String driverName = “org.apache.hive.jdbc.HiveDriver”;
Class.forName(driverName);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.exit(1);
}
Connection con = DriverManager.getConnection(“jdbc:hive2://localhost:10000/default”, “”, “”);
Statement stmt = con.createStatement();
String tableName = “testHiveDriverTable”;
stmt.executeQuery(“drop table ” + tableName);
ResultSet res = stmt.executeQuery(“create table ” + tableName + ” (key int, value string)”);
// show tables
String sql = “show tables ‘” + tableName + “‘”;
System.out.println(“Running: ” + sql);
res = stmt.executeQuery(sql);
}
}