phoenix jdbc doesn't work, no exceptions and stuck - hadoop

Question

I'm new to phoenix and hbase.hbase table and phoenix view works well and i can fetch data through phoenix. when I access jdbc to phoenix,it stucks.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class Phoenix {
private static String driver = "org.apache.phoenix.jdbc.PhoenixDriver";
public static void main(String[] args) throws SQLException {
try {
Class.forName(driver);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Statement stmt = null;
ResultSet rs = null;
System.out.println("start...");
Connection con = DriverManager.getConnection("jdbc:phoenix:[my_cloud_server_ip]:2181");
System.out.println(con);
con.close();
}
}
(only one zookeeper server has public internet ip,so i write this ip there,does it matters?)
it prints "start..." and no response any more
BUT when when the url is "jdbc:phoenix:ip:2181" or "jdbc:phoenix:ip:2181/hbase"
i got no response
when i add some other words ,for example "jdbc:phoenix:ip:2181/balabala"
i got NULL POINTER EXCEPTION
why ?
I hope u can understand what i say:)

Answer 1

Reproducing your example, I am getting a java.net.SocketTimeoutException after 60 seconds, caused by java.net.UnknownHostException: unknown host: <hostname_of_my_zk_server>. But maybe that's what you called "no response" if you were in a hurry (or if you have a custom hbase-site.xml with a larger timeout client-side).
This error seems like the one explained in this article (section Zookeeper at the end) :
As in our case CDH was running in a test VM, we encountered this issue: http://stackoverflow.com/questions/18428722/hbase-java-client-unknown-host-localhost-localdomain
That was worked around by adding localhost.localdomain to the existing /etc/hosts entry for cluster1, which was already pointing to the right IP address.
This answer on SO summarizes the solution.
Basically, you need to add an entry to your /etc/hosts client-side :
<my_cloud_server_ip> <hostname_of_my_cloud_server_ip>
Moreover, you need to have an hbase-site.xml client-side (you can use the one on your server as a basis).