Thanks Harsh. But there is no firewall there, the two clusters are on the same networks. I cannot telnet to the port even on the same machine.
On Thu, Aug 9, 2012 at 6:00 PM, Harsh J <ha...@cloudera.com> wrote: > Hi Jian, > > HFTP is always-on by default. Can you check and make sure that the > firewall isn't the cause of the connection refused on port 50070 on > the NN and ports 50075 on the DNs here? > > On Fri, Aug 10, 2012 at 1:47 AM, Jian Fang > <jian.fang.subscr...@gmail.com> wrote: > > Hi, > > > > We have a hadoop cluster of version 0.20.2 in production. Now we have > > another new Hadoop cluster using cloudera's CDH3U4. We like to run > distcp to > > copy files between the two clusters. Since the hadoop versions are > > different, we have to use hftp protocol to copy files based on the hadoop > > document here: > > http://hadoop.apache.org/common/docs/r0.20.2/distcp.html#cpver. > > > > The problem is that I cannot access files via hftp from the current > > production 0.20.2 cluster even though I can see the following setting > from > > job tracker UI. > > > > dfs.http.address pnjhadoopnn01:50070 > > > > I tried to telnet this port, but got "connection refused" error. Seems > the > > hftp service is not actually running. Could someone tell me how to enable > > the hftp service in the 0.20.2 hadoop cluster so that I can run distcp? > > > > Thanks in advance, > > > > John > > > > -- > Harsh J >
