Thanks Yusaku, I am using Ambari v 1.6.1. Yes, the default value it took for fs.defaultFS is "hdfs://server_1:8020"
The output of hostname -f is: server_1 And, the contents of /etc/hosts is: 127.0.0.1 localhost.localdomain localhost ::1 localhost6.localdomain6 localhost6 192.168.21.138 server_1 192.168.21.137 ambari_server the FQDN I gave during host selection was: server_1 As of now, the error is: safemode: Incomplete HDFS URI, no host: hdfs://server_1:8020 2014-09-16 23:02:41,225 - Retrying after 10 seconds. Reason: Execution of 'su - hdfs -c 'hadoop dfsadmin -safemode get' | grep 'Safe mode is OFF'' returned 1. DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. safemode: Incomplete HDFS URI, no host: hdfs://server_1:8020 Please advise where I am making the mistake? -Ravi On Wed, Sep 17, 2014 at 1:59 AM, Yusaku Sako <yus...@hortonworks.com> wrote: > Hi Ravi, > > What version of Ambari did you use, and how did you install the cluster? > Not sure if this would help, but on small test clusters, you should > define /etc/hosts on each machine, like so: > > 127.0.0.1 <localhost and other default entries> > ::1 <localhost and other default entries> > 192.168.64.101 host1.mycompany.com host1 > 192.168.64.102 host2.mycompany.com host2 > 192.168.64.103 host3.mycompany.com host3 > > Make sure that on each machine, "hostname -f" returns the FQDN (such > as host1.mycompany.com) and "hostname" returns the short name (such as > host1). Also, make sure that you can resolve all other hosts by FQDN. > > fs.defaultFS is set up automatically by Ambari and you should not have > to adjust it, provided that the networking is configured properly. > Ambari sets it to "hdfs://<FQDN of NN host>:8020" (e.g., > "hdfs://host1.mycompany.com:8020) > > Yusaku > > On Tue, Sep 16, 2014 at 12:00 PM, Ravi Itha <ithar...@gmail.com> wrote: > > All, > > > > My Ambari cluster setup is below: > > > > Server 1: Ambari Server was installed > > Server 2: Ambari Agent was installed > > Server 3: Ambari Agent was installed > > > > I create cluster with Server 2 and Server 3 and installed > > > > Server 2 has NameNode > > Server 3 has SNameNode & DataNode > > > > When I try to start NameNode from UI, it does not start > > > > Following are the errors: > > > > 1. safemode: Call From server_1/192.168.21.138 to server_1:8020 failed > on > > connection exception: java.net.ConnectException: Connection refused; For > > more details see: http://wiki.apache.org/hadoop/ConnectionRefused > > > > In this case, the value of fs.defaultFS = hdfs://192.168.21.138 (This > ip is > > server_1's ip. I gave server_1 as the FQDN) > > > > 2. safemode: Call From server_1/192.168.21.138 to localhost:9000 failed > on > > connection exception: java.net.ConnectException: Connection refused; For > > more details see: http://wiki.apache.org/hadoop/ConnectionRefused > > > > In this case, the value of fs.defaultFS = hdfs://localhost > > > > Also, I cannot leave this field as blank. > > > > So can someone, please help me what should be the right value to be set > here > > and I how I can fix the issue. > > > > ~Ravi Itha > > > > > > > > -- > CONFIDENTIALITY NOTICE > NOTICE: This message is intended for the use of the individual or entity to > which it is addressed and may contain information that is confidential, > privileged and exempt from disclosure under applicable law. If the reader > of this message is not the intended recipient, you are hereby notified that > any printing, copying, dissemination, distribution, disclosure or > forwarding of this communication is strictly prohibited. If you have > received this communication in error, please contact the sender immediately > and delete it from your system. Thank You. >
