Try: $ telnet pnjhadoopnn01 50070
-Joey On Fri, Aug 10, 2012 at 1:10 PM, Jian Fang <jian.fang.subscr...@gmail.com> wrote: > Here is the property in hdfs-site.xml > > <property> > <name>dfs.http.address</name> > <value>pnjhadoopnn01:50070</value> > </property> > > Thanks, > > Jian > > > On Fri, Aug 10, 2012 at 11:46 AM, Harsh J <ha...@cloudera.com> wrote: >> >> Yes the test was to figure out if there really was a listener on >> 50070. Can you check the hdfs-site.xml on the NN machine for what its >> dfs.http.address may really be using for its port? >> >> On Fri, Aug 10, 2012 at 7:48 PM, Jian Fang >> <jian.fang.subscr...@gmail.com> wrote: >> > 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 >> > >> > >> >> >> >> -- >> Harsh J > > -- Joey Echeverria Principal Solutions Architect Cloudera, Inc.
