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Date: Mon, 14 Feb 2011 09:54:25 -0800
Message-ID: <AANLkTi=qUOFgHOcNc6s4OyAiySQiSqGL9CdSQsR+NMEL@mail.gmail.com>
Subject: Re: HBase crashes when one server goes down
From: Jean-Daniel Cryans <jdcryans@apache.org>
To: user@hbase.apache.org
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Please use the hbase mailing list for HBase-related questions.

Regarding your issue, we'll need more information to help you out.
Haven you checked the logs? If you see exceptions in there, did you
google them trying to figure out what's going on?

Finally, does your setup meet all the requirements?
http://hbase.apache.org/notsoquick.html#requirements

J-D

On Mon, Feb 14, 2011 at 9:49 AM, Rodrigo Barreto <rodbarreto@gmail.com> wro=
te:
> Hi,
>
> We are new with Hadoop, we have just configured a cluster with 3 servers =
and
> everything is working ok except when one server goes down, the Hadoop / H=
DFS
> continues working but the HBase stops, the queries does not return result=
s
> until we restart the HBase. The HBase configuration is copied bellow, ple=
ase
> help us.
>
> ########## HBASE-SITE.XML ###############
>
> <configuration>
> =A0 =A0 =A0 =A0<property>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<name>hbase.zookeeper.quorum</name>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<value>master,slave1,slave2</value>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<description>The directory shared by regio=
n servers.
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0</description>
> =A0 =A0 =A0 =A0</property>
> =A0 =A0 =A0 =A0<property>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<name>hbase.rootdir</name>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<value>hdfs://master:54310/hbase</value>
> =A0 =A0 =A0 =A0</property>
> =A0 =A0 =A0 =A0<property>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<name>hbase.cluster.distributed</name>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<value>true</value>
> =A0 =A0 =A0 =A0</property>
> =A0 =A0 =A0 =A0<property>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<name>hbase.master</name>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<value>master:60000</value>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<description>The host and port that the HB=
ase master runs
> at.
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0</description>
> =A0 =A0 =A0 =A0</property>
>
> =A0 =A0 =A0 =A0<property>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<name>dfs.replication</name>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<value>2</value>
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0<description>Default block replication.
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0The actual number of replications can be s=
pecified when the
> file is created.
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0The default is used if replication is not =
specified in
> create time.
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0</description>
> =A0 =A0 =A0 =A0</property>
> </configuration>
>
>
> Thanks,
>
> Rodrigo Barreto.
>