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Subject: Re: HDFS balancer ending with error
From: Anurag Tangri <anurag_tangri@yahoo.com>
In-Reply-To: 
 <CAMgBY15n9_-ZE_L=fc_6PC_pZf9KDtUALRP3g-xNFuudbreGcw@mail.gmail.com>
Date: Thu, 29 Jan 2015 17:41:43 -0800
Cc: "cdh-user@cloudera.org" <cdh-user@cloudera.org>
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 <CAMgBY15n9_-ZE_L=fc_6PC_pZf9KDtUALRP3g-xNFuudbreGcw@mail.gmail.com>
To: "user@hadoop.apache.org" <user@hadoop.apache.org>

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:
>=20
> Hello,
> I noticed our CDH5 cluster is not balanced and balancer role is missing. S=
o i added via cloudera manager new balancer role and clicked on rebalance in=
 hdfs menu. After some time task ended as failed.
>=20
> 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 (Balance=
r.java:dispatch(362)) - Failed to move blk_1095182943_21451284 with size=3D4=
3 from 10.xx.xx.14:50010 to 10.xx.xx.12:50010 through 10.xx.xx.14:50010: Pre=
mature EOF: no length prefix available
> Any idea what is the problem about? Cluster is working fine so i have no c=
lue. Maybe i need restart HDFS service first?
>=20
> Thanks,
> JV