Simple Talend job with tHDFSPut fails with Connection refused
I had very similar problem with quickstart cloudera image.I tried to put file by java api from host machine to guest cloudera quickstart machine.The problem was that that the virtualbox machine forwards 8020 namenode port from the host to guest machine, but don't forwards 50010 datanode's port to the guest.Try to add forwarding of 50010 and it will work.
Add an entry in hosts file for the IP address of hadoop namenode you are trying to connect and use hostname instead of IP address in HDFS connection parameter.
Place of hosts file in windows is open Win+R and type %systemroot%\system32\drivers\etc\hosts and make an entry of IP followed by hostname.
ex: 192.168.1.1 hostname