Connection issue when trying to connect HBase in remote server using java

Question

I try to connect with HBase in a remote server using java. Below is my java code

String zookeeperHost = "myserverIP";
String tableName = "User";

Configuration hconfig = HBaseConfiguration.create();
hconfig.setInt("timeout", 1200);
hconfig.set("hbase.zookeeper.quorum",zookeeperHost);
hconfig.set("hbase.zookeeper.property.clientPort", "2181");
TableName tname = TableName.valueOf(tableName);

try {
    HBaseAdmin.checkHBaseAvailable(hconfig);
} catch (ServiceException e) {
    e.printStackTrace();
}

HTableDescriptor htable = new HTableDescriptor(tname);
htable.addFamily( new HColumnDescriptor("Id"));
htable.addFamily( new HColumnDescriptor("Name"));
System.out.println( "Connecting..." );
Connection connection = ConnectionFactory.createConnection(hconfig);
HBaseAdmin hbase_admin = (HBaseAdmin)connection.getAdmin();
System.out.println( "Creating Table..." );
hbase_admin.createTable( htable );
System.out.println("Done!");

but I keep getting this exception

org.apache.hadoop.hbase.MasterNotRunningException:

com.google.protobuf.ServiceException: java.net.ConnectException: Connection >refused: no further information

How can I resolve this issue?

Answer 1

Add below in 'hconfig'

 hconfig.set("hbase.master", hbaseConnectionIpAddr);
 hconfig.set("hbase.master.port", hbaseConnectionPortNum);

Answer 2

There could be two reasons for below exception

org.apache.hadoop.hbase.MasterNotRunningException

1. Remote VM hostname/IP is not accessible by client machine. In order to fix that, you need to update the inbound rules to allow port access. If in case of a VM host name, make sure you have added an entry in /etc/hosts to resolve the host name with IP address.

2. Second issue could be the HBase master is running. Make sure if HMaster service is running from your remote server.