Hi, The error you mentioned below " 'Name or service not known'" means servers not able to communicate to each other. Check network configurations.
Sidharth Mob: +91 8197555599 LinkedIn: www.linkedin.com/in/sidharthkumar2792 On 17-May-2017 12:13 PM, "Bhushan Pathak" <bhushan.patha...@gmail.com> wrote: Apologies for the delayed reply, was away due to some personal issues. I tried the telnet command as well, but no luck. I get the response that 'Name or service not known' Thanks Bhushan Pathak Thanks Bhushan Pathak On Wed, May 3, 2017 at 7:48 AM, Sidharth Kumar <sidharthkumar2...@gmail.com> wrote: > Can you check if the ports are opened by running telnet command. > Run below command from source machine to destination machine and check if > this help > > $telnet <IP address> <port number> > Ex: $telnet 192.168.1.60 9000 > > > Let's Hadooping....! > > Bests > Sidharth > Mob: +91 8197555599 > LinkedIn: www.linkedin.com/in/sidharthkumar2792 > > On 28-Apr-2017 10:32 AM, "Bhushan Pathak" <bhushan.patha...@gmail.com> > wrote: > >> Hello All, >> >> 1. The slave & master can ping each other as well as use passwordless SSH >> 2. The actual IP starts with 10.x.x.x, I have put in the config file as I >> cannot share the actual IP >> 3. The namenode is formatted. I executed the 'hdfs namenode -format' >> again just to rule out the possibility >> 4. I did not configure anything in the master file. I don;t think Hadoop >> 2.7.3 has a master file to be configured >> 5. The netstat command [sudo netstat -tulpn | grep '51150' ] does not >> give any output. >> >> Even if I change the port number to a different one, say 52220, 50000, I >> still get the same error. >> >> Thanks >> Bhushan Pathak >> >> Thanks >> Bhushan Pathak >> >> On Fri, Apr 28, 2017 at 7:52 AM, Lei Cao <charlie.c...@hotmail.com> >> wrote: >> >>> Hi Mr. Bhushan, >>> >>> Have you tried to format namenode? >>> Here's the command: >>> hdfs namenode -format >>> >>> I've encountered such problem as namenode cannot be started. This >>> command line easily fixed my problem. >>> >>> Hope this can help you. >>> >>> Sincerely, >>> Lei Cao >>> >>> >>> On Apr 27, 2017, at 12:09, Brahma Reddy Battula < >>> brahmareddy.batt...@huawei.com> wrote: >>> >>> *Please check “hostname –i” .* >>> >>> >>> >>> >>> >>> *1) **What’s configured in the “master” file.(you shared only >>> slave file).?* >>> >>> >>> >>> *2) **Can you able to “ping master”?* >>> >>> >>> >>> *3) **Can you configure like this check once..?* >>> >>> * 1.1.1.1 master* >>> >>> >>> >>> >>> >>> Regards >>> >>> Brahma Reddy Battula >>> >>> >>> >>> *From:* Bhushan Pathak [mailto:bhushan.patha...@gmail.com >>> <bhushan.patha...@gmail.com>] >>> *Sent:* 27 April 2017 18:16 >>> *To:* Brahma Reddy Battula >>> *Cc:* user@hadoop.apache.org >>> *Subject:* Re: Hadoop 2.7.3 cluster namenode not starting >>> >>> >>> >>> Some additional info - >>> >>> OS: CentOS 7 >>> >>> RAM: 8GB >>> >>> >>> >>> Thanks >>> >>> Bhushan Pathak >>> >>> >>> Thanks >>> >>> Bhushan Pathak >>> >>> >>> >>> On Thu, Apr 27, 2017 at 3:34 PM, Bhushan Pathak < >>> bhushan.patha...@gmail.com> wrote: >>> >>> Yes, I'm running the command on the master node. >>> >>> >>> >>> Attached are the config files & the hosts file. I have updated the IP >>> address only as per company policy, so that original IP addresses are not >>> shared. >>> >>> >>> >>> The same config files & hosts file exist on all 3 nodes. >>> >>> >>> >>> Thanks >>> >>> Bhushan Pathak >>> >>> >>> Thanks >>> >>> Bhushan Pathak >>> >>> >>> >>> On Thu, Apr 27, 2017 at 3:02 PM, Brahma Reddy Battula < >>> brahmareddy.batt...@huawei.com> wrote: >>> >>> Are you sure that you are starting in same machine (master)..? >>> >>> >>> >>> Please share “/etc/hosts” and configuration files.. >>> >>> >>> >>> >>> >>> Regards >>> >>> Brahma Reddy Battula >>> >>> >>> >>> *From:* Bhushan Pathak [mailto:bhushan.patha...@gmail.com] >>> *Sent:* 27 April 2017 17:18 >>> *To:* user@hadoop.apache.org >>> *Subject:* Fwd: Hadoop 2.7.3 cluster namenode not starting >>> >>> >>> >>> Hello >>> >>> >>> >>> I have a 3-node cluster where I have installed hadoop 2.7.3. I have >>> updated core-site.xml, mapred-site.xml, slaves, hdfs-site.xml, >>> yarn-site.xml, hadoop-env.sh files with basic settings on all 3 nodes. >>> >>> >>> >>> When I execute start-dfs.sh on the master node, the namenode does not >>> start. The logs contain the following error - >>> >>> 2017-04-27 14:17:57,166 ERROR >>> org.apache.hadoop.hdfs.server.namenode.NameNode: >>> Failed to start namenode. >>> >>> java.net.BindException: Problem binding to [master:51150] >>> java.net.BindException: Cannot assign requested address; For more details >>> see: http://wiki.apache.org/hadoop/BindException >>> >>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native >>> Method) >>> >>> at sun.reflect.NativeConstructorAccessorImpl.newInstance(Native >>> ConstructorAccessorImpl.java:62) >>> >>> at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(De >>> legatingConstructorAccessorImpl.java:45) >>> >>> at java.lang.reflect.Constructor.newInstance(Constructor.java:4 >>> 23) >>> >>> at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java >>> :792) >>> >>> at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:7 >>> 21) >>> >>> at org.apache.hadoop.ipc.Server.bind(Server.java:425) >>> >>> at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:574) >>> >>> at org.apache.hadoop.ipc.Server.<init>(Server.java:2215) >>> >>> at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:951) >>> >>> at org.apache.hadoop.ipc.ProtobufRpcEngine$Server.<init>(Protob >>> ufRpcEngine.java:534) >>> >>> at org.apache.hadoop.ipc.ProtobufRpcEngine.getServer(ProtobufRp >>> cEngine.java:509) >>> >>> at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:796) >>> >>> at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.<in >>> it>(NameNodeRpcServer.java:345) >>> >>> at org.apache.hadoop.hdfs.server.namenode.NameNode.createRpcSer >>> ver(NameNode.java:674) >>> >>> at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(N >>> ameNode.java:647) >>> >>> at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameN >>> ode.java:812) >>> >>> at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameN >>> ode.java:796) >>> >>> at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNo >>> de(NameNode.java:1493) >>> >>> at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNod >>> e.java:1559) >>> >>> Caused by: java.net.BindException: Cannot assign requested address >>> >>> at sun.nio.ch.Net.bind0(Native Method) >>> >>> at sun.nio.ch.Net.bind(Net.java:433) >>> >>> at sun.nio.ch.Net.bind(Net.java:425) >>> >>> at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelI >>> mpl.java:223) >>> >>> at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java >>> :74) >>> >>> at org.apache.hadoop.ipc.Server.bind(Server.java:408) >>> >>> ... 13 more >>> >>> 2017-04-27 14:17:57,171 INFO org.apache.hadoop.util.ExitUtil: Exiting >>> with status 1 >>> >>> 2017-04-27 14:17:57,176 INFO >>> org.apache.hadoop.hdfs.server.namenode.NameNode: >>> SHUTDOWN_MSG: >>> >>> /************************************************************ >>> >>> SHUTDOWN_MSG: Shutting down NameNode at master/1.1.1.1 >>> >>> ************************************************************/ >>> >>> >>> >>> >>> >>> >>> >>> I have changed the port number multiple times, every time I get the same >>> error. How do I get past this? >>> >>> >>> >>> >>> >>> >>> >>> Thanks >>> >>> Bhushan Pathak >>> >>> >>> >>> >>> >>> >>> >>> >>
