How to find cdh version hadoop

Question: When connecting to Hadoop cluster, how can I know which version of Hadoop this cluster is running? In particular this is important for proper configuration of libraries when compiling and packaging Hadoop Java jobs with Maven.

Answer:

The simplest way if you have ssh access to hadoop node is by running command

$ hadoop version

 

If you are looking for CDH version then check /usr/lib/hadoop/cloudera/cdh_version.properties

 

In cdh, in the cluster I am using, there is not any cdh_version.properties (or I couldn't find it)

If your cluster uses "Parcels", you could check which version of cdh is used by doing:

/opt/cloudera/parcels

And you could see the version as the name of the folder:

CDH-5.5.1-1.cdh5.5.1.p0.11

Note: I know that this is a not a general rule for getting which cdh version is used. I am trying to show an alternative way that it worked to me.