Hi Harsh, Seems the -p requires the root privilege, which I don't have. I run "netstat -a | grep 50070", but did not get back anything. As I said, telnet did not work either.
[hadoop@pnjhadoopnn01 ~]$ telnet pnjhadoopnn01 50070 Trying xx.xx.xx.xx... telnet: connect to address xx.xx.xx.xx: Connection refused telnet: Unable to connect to remote host: Connection refused [hadoop@pnjhadoopnn01 ~]$ telnet localhost 50070 Trying 127.0.0.1... telnet: connect to address 127.0.0.1: Connection refused telnet: Unable to connect to remote host: Connection refused Thanks, Jian On Fri, Aug 10, 2012 at 1:50 AM, Harsh J <ha...@cloudera.com> wrote: > 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 >
