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Date: Sat, 20 Sep 2014 12:55:40 +0200
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Subject: Re: Start standby namenode using bootstrapStandby hangs
From: Adam Kawa <kawa.adam@gmail.com>
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
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Hi,

After throwing out above warning info, the execution of command hangs there
> and did not throw any other warning/error messages any more.
>

Have you tried to use *jstack* to check what the NameNode is really doing
(e.g. whether it's blocked or waiting for something).

*$ sudo -u hdfs jstack -F $(pgrep -f namenode.NameNode).*

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<div dir=3D"ltr">Hi,<div><br><div><div class=3D"gmail_extra"><div class=3D"=
gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-=
style:solid;padding-left:1ex"><div dir=3D"ltr"><div>After throwing out abov=
e warning info, the execution of command hangs there and did not throw any =
other warning/error messages any more. <br></div></div></blockquote><div><b=
r></div><div>Have you tried to use <i>jstack</i> to check what the NameNode=
 is really doing (e.g. whether it&#39;s blocked or waiting for something).<=
/div><div><i><br></i></div><div><i>$ sudo -u hdfs jstack -F $(pgrep -f name=
node.NameNode).</i></div></div></div></div></div></div>

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