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Unable to connect to Hive server2 remotely from a local machine using Java

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Unable to connect to Hive server2 remotely from a local machine using Java

New Contributor

JDBC driver class listed in my Hive configuration is com.mysql.jdbc.Driver.But all the documentation saying that we have to use org.apache.hive.jdbc.HiveDriver.I tried with both of the JDBC Driver class but failed to create a database inside Hive remotely from java.

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Unable to connect to Hive server2 remotely from a local machine using Java

Super Mentor

@Achu Thambi

"NoSuchFieldError" Indicates that you might be using older version of JAR in your client classpath. Because the "" field was added as part of fix:

Added in HiveConnection

- https://issues.apache.org/jira/browse/HIVE-10037

- https://github.com/apache/hive/commit/3ee63c1402e9efda6afa5a8d52785299a08b9a57

("HIVE_CLI_SERVICE_PROTOCOL_V8" was added in the "jdbc/src/java/org/apache/hive/jdbc/HiveConnection.java")

.

- Also from the following JIRA the "TProtocolVersion.HIVE_CLI_SERVICE_PROTOCOL_V8" " was introduced in the "TProtocolVersion.java" class from JIRA

- https://issues.apache.org/jira/browse/HIVE-12442

-

So please double check your client classpath to find out if older version of jar is being loaded there?

.

5 REPLIES 5

Re: Unable to connect to Hive server2 remotely from a local machine using Java

Super Mentor

@Achu Thambi

Are you sure that your remove client has no N/W issue? I mean are you able to connect to the zk hosts like following:

Example if your connection URL is as following

	private static String url = "jdbc:hive2://erie3.example.com:2181,erie1.example.com:2181,erie4.example.com:2181,erie2.example.com:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2";

- Then try to do a telnet from the client machine to findout if it is able to connect to the mentioned hosts and ports?

# telnet  erie1.example.com 2181
# telnet  erie2.example.com 2181
# telnet  erie3.example.com 2181
# telnet  erie4.example.com 2181

.

- Also please refer to the simple HiveClient demo that i placed at my Github repo to see if it works and may you can compare it with your client.

https://github.com/jaysensharma/MiddlewareMagicDemos/blob/master/HDP_Ambari/Hive/HiveJavaClient/src/...

.

For quick testing i wrote the following code to validate if DB creation is happening fine or not?

package client;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class HiveClientDemo {

    private static String commonDriverName = "org.apache.hive.jdbc.HiveDriver";
    private static String url = "jdbc:hive2://erie3.example.com:2181,erie1.example.com:2181,erie4.example.com:2181,erie2.example.com:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2";
    private static String userName = "hive";
    private static String userPass = "hive";
    public static void main(String[] args) throws Exception {
        Class.forName(commonDriverName);
        Connection con = DriverManager.getConnection(url, userName, userPass);
        System.out.println("\n\t Got Connection: " + con);

            System.out.println("*** List the existing Databases....");
        Statement stmt = con.createStatement();
            String sql = "show databases";
            System.out.println("Executing Query: " + sql);
            ResultSet rs = stmt.executeQuery(sql);
            while (rs.next()) {
                  System.out.println(rs.getString(1));
            }

            sql = "create database Test12345DB";
            System.out.println("Executing Query: " + sql);
            stmt.execute(sql);

            System.out.println("*** After Creating a new Database....");
            sql = "show databases";
            System.out.println("Executing Query: " + sql);
            rs = stmt.executeQuery(sql);
            while (rs.next()) {
                  System.out.println(rs.getString(1));
            }
    }
}

-

I got the following output that shows the newly created Database is showing up properly.

     Got Connection: org.apache.hive.jdbc.HiveConnection@65e3690
*** List the existing Databases....
Executing Query: show databases
abcd
default
movielens
myretail
test
test1
test3
testdb
testdb_a
testdb_c

Executing Query: create database Test12345DB

*** After Creating a new Database....
Executing Query: show databases
abcd
default
movielens
myretail
test
test1
test12345db
test3
testdb
testdb_a

.

Please compare the above code with yours and let us know if you see any difference.

- Still if it fails to connect Or fails to create a database then please share the complete stack trace of the error/exception that you receive at the client side.

.

Re: Unable to connect to Hive server2 remotely from a local machine using Java

New Contributor

Hi @Jay SenSharma

Thank you for the quick reply.Itried telnet..its working fine.But now I am getting the error "

Apache Hive client throw NoSuchFieldError: HIVE_CLI_SERVICE_PROTOCOL_V8".

Re: Unable to connect to Hive server2 remotely from a local machine using Java

Super Mentor

@Achu Thambi

"NoSuchFieldError" Indicates that you might be using older version of JAR in your client classpath. Because the "" field was added as part of fix:

Added in HiveConnection

- https://issues.apache.org/jira/browse/HIVE-10037

- https://github.com/apache/hive/commit/3ee63c1402e9efda6afa5a8d52785299a08b9a57

("HIVE_CLI_SERVICE_PROTOCOL_V8" was added in the "jdbc/src/java/org/apache/hive/jdbc/HiveConnection.java")

.

- Also from the following JIRA the "TProtocolVersion.HIVE_CLI_SERVICE_PROTOCOL_V8" " was introduced in the "TProtocolVersion.java" class from JIRA

- https://issues.apache.org/jira/browse/HIVE-12442

-

So please double check your client classpath to find out if older version of jar is being loaded there?

.

Re: Unable to connect to Hive server2 remotely from a local machine using Java

New Contributor
@Jay SenSharma

My hive version is 1.2.1...I tried with all the jar files of version related to 1.2.1 which is available,but I am sorry to say that I am getting the same error.

Re: Unable to connect to Hive server2 remotely from a local machine using Java

New Contributor

@Jay SenSharma...Got it...Thanks a lot...I used jar files of version 1.1 and removed all the older versions of jar..