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From Harsh J <ha...@cloudera.com>
Subject Re: hftp in Hadoop 0.20.2
Date Thu, 09 Aug 2012 22:00:38 GMT
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

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