Lets say your Hadoop hdfs port has this address:
Simply replace hdfs with http and try to connect with a browser. Like this:
You should get the message:
It looks like you are making an HTTP request to a Hadoop IPC port. This is not the correct port for the web interface on this daemon.
If you don't get this message, you'll need to work out why your Hadoop system is not responding.
Command(s) completed successfully.
PolyBase does not validate your Hadoop Location when you create a new external data source. For example, we created our new, but invalid data source with the following command. One that has a totally invalid hdfs location value:
CREATE EXTERNAL DATA SOURCE [invalid]
TYPE = HADOOP
, LOCATION = N'hdfs://192.168.1.130:8020'
, RESOURCE_MANAGER_LOCATION = N'192.168.1.130:8050'
PolyBase simple returned this value: Command(s) completed successfully. The point, is that just because you can create a Hadoop external data source does not mean that it is valid.