Default Namenode port of HDFS is 50070.But I have come across at some places 8020 or 9000 [closed]

Question

When I setup the hadoop cluster, I read the namenode runs on 50070 and I set up accordingly and it's running fine.

But in some books I have come across name node address :

hdfs://localhost:9000/ 

or

hdfs://localhost:8020 

What exactly is the proper number to set the port of namenode?

Answer 1

The default Hadoop ports are as follows: (HTTP ports, they have WEB UI):

Daemon                   Default Port  Configuration Parameter -----------------------  ------------ ---------------------------------- Namenode                 50070        dfs.http.address Datanodes                50075        dfs.datanode.http.address Secondarynamenode        50090        dfs.secondary.http.address Backup/Checkpoint node?  50105        dfs.backup.http.address Jobracker                50030        mapred.job.tracker.http.address Tasktrackers             50060        mapred.task.tracker.http.address 

Internally, Hadoop mostly uses Hadoop IPC, which stands for Inter Process Communicator, to communicate amongst servers. The following table presents the ports and protocols that Hadoop uses. This table does not include the HTTP ports mentioned above.

Daemon      Default Port        Configuration Parameter      ------------------------------------------------------------ Namenode    8020                fs.default.name          Datanode    50010               dfs.datanode.address         Datanode    50020               dfs.datanode.ipc.address                                     Backupnode  50100               dfs.backup.address           

check out this link For more info: http://blog.cloudera.com/blog/2009/08/hadoop-default-ports-quick-reference/