have you checked firewall on namenode. If you are running ubuntu and namenode port is 8020 command is -> ufw allow 8020
Thanks and Regards, Rishi Yadav InfoObjects Inc || http://www.infoobjects.com *(Big Data Solutions)* On Mon, Apr 8, 2013 at 6:57 PM, Azuryy Yu <azury...@gmail.com> wrote: > can you use command "jps" on your localhost to see if there is NameNode > process running? > > > On Tue, Apr 9, 2013 at 2:27 AM, Bjorn Jonsson <bjorn...@gmail.com> wrote: > >> Yes, the namenode port is not open for your cluster. I had this problem >> to. First, log into your namenode and do netstat -nap to see what ports are >> listening. You can do service --status-all to see if the namenode service >> is running. Basically you need Hadoop to bind to the correct ip (an >> external one, or at least reachable from your remote machine). So listening >> on 127.0.0.1 or localhost or some ip for a private network will not be >> sufficient. Check your /etc/hosts file and /etc/hadoop/conf/*-site.xml >> files to configure the correct ip/ports. >> >> I'm no expert, so my understanding might be limited/wrong...but I hope >> this helps :) >> >> Best, >> B >> >> >> On Mon, Apr 8, 2013 at 7:29 AM, Saurabh Jain >> <saurabh_j...@symantec.com>wrote: >> >>> Hi All,**** >>> >>> ** ** >>> >>> I have setup a single node cluster(release hadoop-1.0.4). Following is >>> the configuration used –**** >>> >>> ** ** >>> >>> *core-site.xml :-* >>> >>> ** ** >>> >>> <property>**** >>> >>> <name>fs.default.name</name>**** >>> >>> <value>hdfs://localhost:54310</value> **** >>> >>> </property>**** >>> >>> * * >>> >>> *masters:-* >>> >>> localhost**** >>> >>> ** ** >>> >>> *slaves:-* >>> >>> localhost**** >>> >>> ** ** >>> >>> I am able to successfully format the Namenode and perform files system >>> operations by running the CLIs on Namenode.**** >>> >>> ** ** >>> >>> But I am receiving following error when I try to access HDFS from a *remote >>> machine* – **** >>> >>> ** ** >>> >>> $ bin/hadoop fs -ls /**** >>> >>> Warning: $HADOOP_HOME is deprecated.**** >>> >>> ** ** >>> >>> 13/04/08 07:13:56 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 0 time(s).**** >>> >>> 13/04/08 07:13:57 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 1 time(s).**** >>> >>> 13/04/08 07:13:58 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 2 time(s).**** >>> >>> 13/04/08 07:13:59 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 3 time(s).**** >>> >>> 13/04/08 07:14:00 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 4 time(s).**** >>> >>> 13/04/08 07:14:01 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 5 time(s).**** >>> >>> 13/04/08 07:14:02 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 6 time(s).**** >>> >>> 13/04/08 07:14:03 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 7 time(s).**** >>> >>> 13/04/08 07:14:04 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 8 time(s).**** >>> >>> 13/04/08 07:14:05 INFO ipc.Client: Retrying connect to server: >>> 10.209.10.206/10.209.10.206:54310. Already tried 9 time(s).**** >>> >>> Bad connection to FS. command aborted. exception: Call to >>> 10.209.10.206/10.209.10.206:54310 failed on connection exception: >>> java.net.ConnectException: Connection refused**** >>> >>> ** ** >>> >>> Where 10.209.10.206 is the IP of the server hosting the Namenode and it >>> is also the configured value for “fs.default.name” in the core-site.xml >>> file on the remote machine.**** >>> >>> ** ** >>> >>> Executing ‘*bin/hadoop fs -fs hdfs://10.209.10.206:54310 -ls /*’ also >>> result in same output.**** >>> >>> ** ** >>> >>> Also, I am writing a C application using libhdfs to communicate with >>> HDFS. How do we provide credentials while connecting to HDFS?**** >>> >>> ** ** >>> >>> Thanks**** >>> >>> Saurabh**** >>> >>> ** ** >>> >>> ** ** >>> >> >> >
