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Date: Mon, 2 Feb 2015 09:55:54 +0100
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 <CAMgBY14ugJU0M8QMGgnSXVQAqOVwHZ6Wkfp50Nm8z7+V802nKg@mail.gmail.com>
Subject: Re: HDFS balancer ending with error
From: Juraj jiv <fatcap.jiv@gmail.com>
To: user@hadoop.apache.org, cdh-user@cloudera.org
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Hello, restart cloudera cluster helped. After that balancer started
working. Dunno why, all fine now.

JV

On Fri, Jan 30, 2015 at 2:41 AM, Anurag Tangri <anurag_tangri@yahoo.com>
wrote:

> Is your cluster fully upgraded to CDH5 ?
>
>
> Thanks,
> Anurag Tangri
>
> > On Jan 29, 2015, at 6:33 AM, Juraj jiv <fatcap.jiv@gmail.com> wrote:
> >
> > Hello,
> > I noticed our CDH5 cluster is not balanced and balancer role is missing.
> So i added via cloudera manager new balancer role and clicked on rebalance
> in hdfs menu. After some time task ended as failed.
> >
> > In logs i can balancer started but when it want to start moving blocks
> all failed with message like:
> > 2015-01-29 15:26:55,131 WARN  [pool-4-thread-4] balancer.Balancer
> (Balancer.java:dispatch(362)) - Failed to move blk_1095182943_21451284 with
> size=43 from 10.xx.xx.14:50010 to 10.xx.xx.12:50010 through
> 10.xx.xx.14:50010: Premature EOF: no length prefix available
> > Any idea what is the problem about? Cluster is working fine so i have no
> clue. Maybe i need restart HDFS service first?
> >
> > Thanks,
> > JV
>

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<div dir=3D"ltr"><div>Hello, restart cloudera cluster helped. After that ba=
lancer started working. Dunno why, all fine now.<br><br></div>JV<br></div><=
div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Fri, Jan 30, 20=
15 at 2:41 AM, Anurag Tangri <span dir=3D"ltr">&lt;<a href=3D"mailto:anurag=
_tangri@yahoo.com" target=3D"_blank">anurag_tangri@yahoo.com</a>&gt;</span>=
 wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex">Is your cluster fully upgraded to=
 CDH5 ?<br>
<br>
<br>
Thanks,<br>
Anurag Tangri<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
&gt; On Jan 29, 2015, at 6:33 AM, Juraj jiv &lt;<a href=3D"mailto:fatcap.ji=
v@gmail.com">fatcap.jiv@gmail.com</a>&gt; wrote:<br>
&gt;<br>
&gt; Hello,<br>
&gt; I noticed our CDH5 cluster is not balanced and balancer role is missin=
g. So i added via cloudera manager new balancer role and clicked on rebalan=
ce in hdfs menu. After some time task ended as failed.<br>
&gt;<br>
&gt; In logs i can balancer started but when it want to start moving blocks=
 all failed with message like:<br>
&gt; 2015-01-29 15:26:55,131 WARN=C2=A0 [pool-4-thread-4] balancer.Balancer=
 (Balancer.java:dispatch(362)) - Failed to move blk_1095182943_21451284 wit=
h size=3D43 from 10.xx.xx.14:50010 to 10.xx.xx.12:50010 through 10.xx.xx.14=
:50010: Premature EOF: no length prefix available<br>
&gt; Any idea what is the problem about? Cluster is working fine so i have =
no clue. Maybe i need restart HDFS service first?<br>
&gt;<br>
&gt; Thanks,<br>
&gt; JV<br>
</div></div></blockquote></div><br></div>

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