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From Jian Fang <jian.fang.subscr...@gmail.com>
Subject Re: hftp in Hadoop 0.20.2
Date Fri, 10 Aug 2012 14:18:09 GMT
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 <harsh@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.subscribe@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 <harsh@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.subscribe@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
>

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