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From: "John Beaulaurier -X (jbeaulau - ADVANCED NETWORK INFORMATION INC at
 Cisco)" <jbeaulau@cisco.com>
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
Subject: SSH passwordless & Hadoop starup/shutdown scripts 
Thread-Topic: SSH passwordless & Hadoop starup/shutdown scripts 
Thread-Index: AdAJnzi/UApb0v04QJexvE9vzQfrQg==
Date: Wed, 26 Nov 2014 17:34:26 +0000
Message-ID: <565B75ACD9C9964EA087653C7D7A65B70BB91BFE@xmb-aln-x14.cisco.com>
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Hello,

I had originally configured our dev cluster with SSH passwordless connectiv=
ity to the datanodes, but had a passphrase. I have
updated with no passphrase, and have copied the new public key to all datan=
odes updating their know_host files, and have tested
SSH with no passphrase from the namenode to all three datanodes with succes=
s. However when I initiate a stop-dfs.sh or
stop-mapred.sh as user running the current Hadoop processes the following i=
s returned without ending the processes.

no namenode to stop
hostname,hostname,hostname,hostname: ssh: hostname,hostname,hostname,hostna=
me: Name or service not knows

Can someone suggest where I should be looking for configuration issues?

Thank you
-John


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<p class=3D"MsoNormal">Hello,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I had originally configured our dev cluster with SSH=
 passwordless connectivity to the datanodes, but had a passphrase. I have<o=
:p></o:p></p>
<p class=3D"MsoNormal">updated with no passphrase, and have copied the new =
public key to all datanodes updating their know_host files, and have tested
<o:p></o:p></p>
<p class=3D"MsoNormal">SSH with no passphrase from the namenode to all thre=
e datanodes with success. However when I initiate a stop-dfs.sh or<o:p></o:=
p></p>
<p class=3D"MsoNormal">stop-mapred.sh as user running the current Hadoop pr=
ocesses the following is returned without ending the processes.<o:p></o:p><=
/p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">no namenode to stop<o:p></o:p></p>
<p class=3D"MsoNormal">hostname,hostname,hostname,hostname: ssh: hostname,h=
ostname,hostname,hostname: Name or service not knows<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Can someone suggest where I should be looking for co=
nfiguration issues?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thank you<o:p></o:p></p>
<p class=3D"MsoNormal">-John &nbsp;<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;<o:p></o:p></p>
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