Hi toashok,

One of my colleagues ran this on their test cluster without issue, so it sounds like it could be a configuration issue. There isn't enough information here to go on though to give you any advice as to where to look. I would recommend opening a ticket with Isilon Support to dive deeper into the issue.

https://support.emc.com/servicecenter/createSR

However, based on the "Connection Refused" error, it does give us some idea what is going on.

If we work from the top down:

Every tcp connection needs to be in a groupnet/subnet/pool

Every groupnet/subnet/pool needs to be in a zone

Every zone needs a authentication provider

every authentication provider in a zone has services

So if you get connection refused it is most likely that the service is not running because nothing is listening on that port/socket. So you could start by checking on the services.

Hi toashok

OneFS hdfs protocol access does not support 'dfsadmin -fetchImage' since Isilon is OneFS and not an HDFS datanode some hadoop operations do not function with hdfs protocol based access to OneFS data.

Opening connection to http://xxxx:50070/imagetransfer?getimage=1&txid=latest

16/09/01 10:09:37 INFO namenode.TransferFsImage: Image Transfer timeout configured to 60000 milliseconds

fetchImage: Connection refused

Also your http connection is using 50070, Isilon does protocol access via 8082, so you may have a misconfiguration with hadoop - Isilon for other protocol access. MIght be worth checking that out.