Find port number where HDFS is listening

Below command available in Apache hadoop 2.7.0 onwards, this can be used for getting the values for the hadoop configuration properties. fs.default.name is deprecated in hadoop 2.0, fs.defaultFS is the updated value. Not sure whether this will work incase of maprfs.

hdfs getconf -confKey fs.defaultFS  # ( new property ) 

or

hdfs getconf -confKey fs.default.name    # ( old property ) 

Not sure whether there is any command line utilities available for retrieving configuration properties values in Mapr or hadoop 0.20 hadoop versions. In case of this situation you better try the same in Java for retrieving the value corresponding to a configuration property.

Configuration hadoop conf = Configuration.getConf();System.out.println(conf.get("fs.default.name"));

fs.default.name is deprecated.

use : hdfs getconf -confKey fs.defaultFS

I encountered this answer when I was looking for HDFS URI. Generally that's a URL pointing to the namenode. While hdfs getconf -confKey fs.defaultFS gets me the name of the nameservice but it won't help me building the HDFS URI.

I tried the command below to get a list of the namenodes instead

 hdfs getconf -namenodes

This gave me a list of all the namenodes, primary first followed by secondary. After that constructing the HDFS URI was simple

hdfs://<primarynamenode>/