Hi: I tried and was succesfull in changing etc/hosts. I shutdown and re-started and get the same error. anand_vihar@Latitude-E5540:~$ ssh localhost Welcome to Ubuntu 14.10 (GNU/Linux 3.16.0-34-generic x86_64)
* Documentation: https://help.ubuntu.com/ Last login: Thu Apr 23 11:18:43 2015 from localhost anand_vihar@Latitude-E5540:~$ cd hadoop-2.6.0 anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ . .hadoop /home/anand_vihar/hadoop-2.6.0 /home/anand_vihar/jdk1.7.0_75 /home/anand_vihar/hadoop-2.6.0 anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ hdfs dfs -ls ls: Call From java.net.UnknownHostException: Latitude-E5540: Latitude-E5540 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ Very strange. Regards Anand Murali 11/7, 'Anand Vihar', Kandasamy St, MylaporeChennai - 600 004, IndiaPh: (044)- 28474593/ 43526162 (voicemail) On Thursday, April 23, 2015 11:22 AM, Anand Murali <anand_vi...@yahoo.com> wrote: Many thanks my friend. Shall try it right away. Anand Murali 11/7, 'Anand Vihar', Kandasamy St, MylaporeChennai - 600 004, IndiaPh: (044)- 28474593/ 43526162 (voicemail) On Thursday, April 23, 2015 10:51 AM, sandeep vura <sandeepv...@gmail.com> wrote: run this command in the terminal from root directory $ sudo nano /etc/hosts (( It will prompt to enter root password)) Later you can comment those lines in hosts files #127.0.1.1 add this line 127.0.0.1 localhost save the host file and exit On Thu, Apr 23, 2015 at 8:39 AM, Anand Murali <anand_vi...@yahoo.com> wrote: Sudo what my friend. There are so many options to sudo Sent from my iPhone On 23-Apr-2015, at 8:20 am, sandeep vura <sandeepv...@gmail.com> wrote: Ananad, Try sudo it will work On Wed, Apr 22, 2015 at 5:58 PM, Shahab Yunus <shahab.yu...@gmail.com> wrote: Can you try sudo?https://www.linux.com/learn/tutorials/306766:linux-101-introduction-to-sudo Regards,Shahab On Wed, Apr 22, 2015 at 8:26 AM, Anand Murali <anand_vi...@yahoo.com> wrote: Dear Sandeep: many thanks. I did find hosts, but I do not have write priveleges, eventhough I am administrator. This is strange. Can you please advise. Thanks Anand Murali 11/7, 'Anand Vihar', Kandasamy St, MylaporeChennai - 600 004, IndiaPh: (044)- 28474593/ 43526162 (voicemail) On Wednesday, April 22, 2015 4:43 PM, sandeep vura <sandeepv...@gmail.com> wrote: Hi Anand, You should search /etc directory in root not Hadoop directory. On Wed, Apr 22, 2015 at 2:57 PM, Anand Murali <anand_vi...@yahoo.com> wrote: Dear All: I dont see a etc/host. Find below. anand_vihar@Latitude-E5540:~$ cd hadoop-2.6.0 anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ ls -al total 76 drwxr-xr-x 12 anand_vihar anand_vihar 4096 Apr 21 13:23 . drwxrwxr-x 26 anand_vihar anand_vihar 4096 Apr 22 14:05 .. drwxr-xr-x 2 anand_vihar anand_vihar 4096 Nov 14 02:50 bin drwxr-xr-x 3 anand_vihar anand_vihar 4096 Nov 14 02:50 etc -rw-rw-r-- 1 anand_vihar anand_vihar 340 Apr 21 11:51 .hadoop drwxr-xr-x 2 anand_vihar anand_vihar 4096 Nov 14 02:50 include drwxrwxr-x 2 anand_vihar anand_vihar 4096 Apr 22 14:04 input drwxr-xr-x 3 anand_vihar anand_vihar 4096 Nov 14 02:50 lib drwxr-xr-x 2 anand_vihar anand_vihar 4096 Nov 14 02:50 libexec -rw-r--r-- 1 anand_vihar anand_vihar 15429 Nov 14 02:50 LICENSE.txt drwxrwxr-x 3 anand_vihar anand_vihar 4096 Apr 22 14:08 logs -rw-r--r-- 1 anand_vihar anand_vihar 101 Nov 14 02:50 NOTICE.txt drwxrwxr-x 2 anand_vihar anand_vihar 4096 Apr 21 11:48 output -rw-r--r-- 1 anand_vihar anand_vihar 1366 Nov 14 02:50 README.txt drwxr-xr-x 2 anand_vihar anand_vihar 4096 Nov 14 02:50 sbin drwxr-xr-x 4 anand_vihar anand_vihar 4096 Nov 14 02:50 share anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ cd etc anand_vihar@Latitude-E5540:~/hadoop-2.6.0/etc$ ls -al total 12 drwxr-xr-x 3 anand_vihar anand_vihar 4096 Nov 14 02:50 . drwxr-xr-x 12 anand_vihar anand_vihar 4096 Apr 21 13:23 .. drwxr-xr-x 2 anand_vihar anand_vihar 4096 Apr 21 13:20 hadoop anand_vihar@Latitude-E5540:~/hadoop-2.6.0/etc$ cd hadoop anand_vihar@Latitude-E5540:~/hadoop-2.6.0/etc/hadoop$ ls -al total 176 drwxr-xr-x 2 anand_vihar anand_vihar 4096 Apr 21 13:20 . drwxr-xr-x 3 anand_vihar anand_vihar 4096 Nov 14 02:50 .. -rw-r--r-- 1 anand_vihar anand_vihar 4436 Nov 14 02:50 capacity-scheduler.xml -rw-r--r-- 1 anand_vihar anand_vihar 1335 Nov 14 02:50 configuration.xsl -rw-r--r-- 1 anand_vihar anand_vihar 318 Nov 14 02:50 container-executor.cfg -rw-r--r-- 1 anand_vihar anand_vihar 880 Apr 21 13:16 core-site.xml -rw-r--r-- 1 anand_vihar anand_vihar 774 Nov 14 02:50 core-site.xml~ -rw-r--r-- 1 anand_vihar anand_vihar 3670 Nov 14 02:50 hadoop-env.cmd -rw-r--r-- 1 anand_vihar anand_vihar 4224 Nov 14 02:50 hadoop-env.sh -rw-r--r-- 1 anand_vihar anand_vihar 2598 Nov 14 02:50 hadoop-metrics2.properties -rw-r--r-- 1 anand_vihar anand_vihar 2490 Nov 14 02:50 hadoop-metrics.properties -rw-r--r-- 1 anand_vihar anand_vihar 9683 Nov 14 02:50 hadoop-policy.xml -rw-r--r-- 1 anand_vihar anand_vihar 863 Apr 21 13:17 hdfs-site.xml -rw-r--r-- 1 anand_vihar anand_vihar 775 Nov 14 02:50 hdfs-site.xml~ -rw-r--r-- 1 anand_vihar anand_vihar 1449 Nov 14 02:50 httpfs-env.sh -rw-r--r-- 1 anand_vihar anand_vihar 1657 Nov 14 02:50 httpfs-log4j.properties -rw-r--r-- 1 anand_vihar anand_vihar 21 Nov 14 02:50 httpfs-signature.secret -rw-r--r-- 1 anand_vihar anand_vihar 620 Nov 14 02:50 httpfs-site.xml -rw-r--r-- 1 anand_vihar anand_vihar 3523 Nov 14 02:50 kms-acls.xml -rw-r--r-- 1 anand_vihar anand_vihar 1325 Nov 14 02:50 kms-env.sh -rw-r--r-- 1 anand_vihar anand_vihar 1631 Nov 14 02:50 kms-log4j.properties -rw-r--r-- 1 anand_vihar anand_vihar 5511 Nov 14 02:50 kms-site.xml -rw-r--r-- 1 anand_vihar anand_vihar 11291 Nov 14 02:50 log4j.properties -rw-r--r-- 1 anand_vihar anand_vihar 938 Nov 14 02:50 mapred-env.cmd -rw-r--r-- 1 anand_vihar anand_vihar 1383 Nov 14 02:50 mapred-env.sh -rw-r--r-- 1 anand_vihar anand_vihar 4113 Nov 14 02:50 mapred-queues.xml.template -rw-r--r-- 1 anand_vihar anand_vihar 858 Apr 21 13:19 mapred-site.xml -rw-r--r-- 1 anand_vihar anand_vihar 758 Nov 14 02:50 mapred-site.xml.template~ -rw-r--r-- 1 anand_vihar anand_vihar 10 Nov 14 02:50 slaves -rw-r--r-- 1 anand_vihar anand_vihar 2316 Nov 14 02:50 ssl-client.xml.example -rw-r--r-- 1 anand_vihar anand_vihar 2268 Nov 14 02:50 ssl-server.xml.example -rw-r--r-- 1 anand_vihar anand_vihar 2237 Nov 14 02:50 yarn-env.cmd -rw-r--r-- 1 anand_vihar anand_vihar 4567 Nov 14 02:50 yarn-env.sh -rw-r--r-- 1 anand_vihar anand_vihar 809 Apr 21 13:20 yarn-site.xml -rw-r--r-- 1 anand_vihar anand_vihar 690 Nov 14 02:50 yarn-site.xml~ anand_vihar@Latitude-E5540:~/hadoop-2.6.0/etc/hadoop$ cat slaves localhost anand_vihar@Latitude-E5540:~/hadoop-2.6.0/etc/hadoop$ Thanks. Regards, Anand Murali 11/7, 'Anand Vihar', Kandasamy St, MylaporeChennai - 600 004, IndiaPh: (044)- 28474593/ 43526162 (voicemail) On Wednesday, April 22, 2015 2:41 PM, Anand Murali <anand_vi...@yahoo.com> wrote: Ok thanks will do Sent from my iPhone On 22-Apr-2015, at 2:39 pm, sandeep vura <sandeepv...@gmail.com> wrote: hosts file will be available in /etc directory please check once. On Wed, Apr 22, 2015 at 2:36 PM, Anand Murali <anand_vi...@yahoo.com> wrote: I don't seem to have etc/host Sent from my iPhone On 22-Apr-2015, at 2:30 pm, sandeep vura <sandeepv...@gmail.com> wrote: Hi Anand, comment the ip address - 127.0.1.1 in /etc/hostsadd the following ip address - 127.0.0.1 localhost in /etc/hosts. Restart your hadoop cluster after made changes in /etc/hosts Regards,Sandeep.v On Wed, Apr 22, 2015 at 2:16 PM, Anand Murali <anand_vi...@yahoo.com> wrote: Dear All: Has anyone encountered this error and if so how have you fixed it other then re-installing Hadoop or re-starting start-dfs.sh when you have already started after boot. Find below anand_vihar@Latitude-E5540:~$ ssh localhost Welcome to Ubuntu 14.10 (GNU/Linux 3.16.0-34-generic x86_64) * Documentation: https://help.ubuntu.com/ 1 package can be updated. 1 update is a security update. Last login: Wed Apr 22 13:33:26 2015 from localhost anand_vihar@Latitude-E5540:~$ cd hadoop-2.6.0 anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ . .hadoop /home/anand_vihar/hadoop-2.6.0 /home/anand_vihar/jdk1.7.0_75 /home/anand_vihar/hadoop-2.6.0 anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ hadoop version Hadoop 2.6.0 Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r e3496499ecb8d220fba99dc5ed4c99c8f9e33bb1 Compiled by jenkins on 2014-11-13T21:10Z Compiled with protoc 2.5.0 >From source with checksum 18e43357c8f927c0695f1e9522859d6a This command was run using /home/anand_vihar/hadoop-2.6.0/share/hadoop/common/hadoop-common-2.6.0.jar anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ start-dfs.sh Starting namenodes on [localhost] localhost: starting namenode, logging to /home/anand_vihar/hadoop-2.6.0/logs/hadoop-anand_vihar-namenode-Latitude-E5540.out localhost: starting datanode, logging to /home/anand_vihar/hadoop-2.6.0/logs/hadoop-anand_vihar-datanode-Latitude-E5540.out Starting secondary namenodes [0.0.0.0] 0.0.0.0: starting secondarynamenode, logging to /home/anand_vihar/hadoop-2.6.0/logs/hadoop-anand_vihar-secondarynamenode-Latitude-E5540.out anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ hdfs dfs -ls ls: Call From Latitude-E5540/127.0.1.1 to localhost:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused anand_vihar@Latitude-E5540:~/hadoop-2.6.0$ I have checked http://wiki.apache.org/hadoop/ConnectionRefused but there is no fix to the problem rather it seems to be a Ubuntu network problem. I have many times killed nanenode/datanode/secondary data note, shutdown and restarted, but this error still appears. The only way seems to be re-installing hadoop. Please advise or refer. Many thanks, Regards, Anand Murali 11/7, 'Anand Vihar', Kandasamy St, MylaporeChennai - 600 004, IndiaPh: (044)- 28474593/ 43526162 (voicemail)
