Jian, >From your NN, can you get us the output "netstat -anp | grep 50070"?
On Fri, Aug 10, 2012 at 9:29 AM, Jian Fang <jian.fang.subscr...@gmail.com> wrote: > 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 > > -- Harsh J
