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