hadoop学习笔记之-hbase完全分布模…

安装环境：

OS: Oracle linux 5.6

JDK: jdk1.6.0_18

Hadoop: hadoop-0.20.2

Hbase: hbase-0.90.5

安装准备：

1. Jdk环境已安装：版本为1.6以上

2. hadoop环境已安装：完全分布模式安装如下

http://blog.csdn.net/lichangzai/article/details/8206834

3. hbase版本选择

Hbase 版本必需与 Hadoop版本匹配，否则会安装失败或不能正常使用。关于两者何种版本能正常匹配，可以看官方文档或在网上搜寻安装的成功案例。

4. hbase软件下载

http://mirror.bjtu.edu.cn/apache/hbase/hbase-0.90.5/

安装概述：

l 配置hosts，确保涉及的主机名均可以解析为ip

l 编辑hbase-env.xml

l 编辑hbase-site.xml

l 编辑regionservers文件

l 把Hbase复制到其它节点

l 启动Hbase

l 验证启动

安装步骤：

1. 配置hosts

此步在配置hadoop时已经完成，如下：

[root@gc ~]$ cat /etc/hosts

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1 localhost.localdomain localhost

::1 localhost6.localdomain6 localhost6

192.168.2.101 rac1.localdomain rac1

192.168.2.102 rac2.localdomain rac2

192.168.2.100 gc.localdomain gc

2. 拷贝并解压安装包

[grid@gc ~]$ pwd

/home/grid

[grid@gc ~]$ tar -xzvf hbase-0.90.5.tar.gz

3. 替换hadoop核心jar包

主要目的是防止因为hbase和hadoop版本不同出现兼容问题，造成hmaster启动异常

$ pwd

/home/grid/hbase-0.90.5/lib

$ mv hadoop-core-0.20-append-r1056497.jar hadoop-core-0.20-append-r1056497.jar.bak

$ cp /home/grid/hadoop-0.20.2/hadoop-0.20.2-core.jar /home/grid/hbase-0.90.5/lib/

$ chmod 775 hadoop-0.20.2-core.jar

4. 编辑hbase-env.xml

[grid@gc conf]$ pwd

/home/grid/hbase-0.90.5/conf

[grid@gc conf]$ vi hbase-env.sh

# 添加如下内容

# The java implementation to use. Java 1.6 required.

export JAVA_HOME=/usr/java/jdk1.6.0_18

# Extra Java CLASSPATH elements. Optional.

export HBASE_CLASSPATH=/home/grid/hadoop-0.20.2/conf

# Where log files are stored. $HBASE_HOME/logs by default.

export HBASE_LOG_DIR=${HBASE_HOME}/logs

# Tell HBase whether it should manage it's own instance of Zookeeper or not.

export HBASE_MANAGES_ZK=true

5. 编辑hbase-site.xml

[grid@gc conf]$ vi hbase-site.xml

# 添加如下内容

 

hbase.rootdir #设置hbase数据库存放数据的目录

hdfs://gc:9000/hbase

 

 

hbase.cluster.distributed #打开hbase分布模式

true

 

 

hbase.master #指定hbase集群主控节点

gc:60000

 

 

hbase.zookeeper.quorum

gc,rac1,rac2 #指定zookeeper集群节点名,因为是由zookeeper表决算法决定的

 

 

hbase.zookeeper.property.dataDir #指zookeeper集群data目录

/home/grid/hbase-0.90.5/zookeeper

 

6. 编辑regionservers文件

[grid@gc conf]$ cat regionservers

# 把localhost改为如下

rac1

rac2

7. 将修改的hbase目录同步其它节点

--分别同步到rac1,rac2两节点

[grid@gc ~]$ scp -r hbase-0.90.5 rac1:/home/grid/

[grid@gc ~]$ scp -r hbase-0.90.5 rac2:/home/grid/

8. 启动/关闭Hbase数据库集群

--启动hbase之前必需检查hadoop是否已经启动

[grid@gc ~]$ hadoop-0.20.2/bin/hadoop dfsadmin -report

Configured Capacity: 45702094848 (42.56 GB)

Present Capacity: 3562618880 (3.32 GB)

DFS Remaining: 3562348544 (3.32 GB)

DFS Used: 270336 (264 KB)

DFS Used%: 0.01%

Under replicated blocks: 4

Blocks with corrupt replicas: 0

Missing blocks: 0

 

-------------------------------------------------

Datanodes available: 2 (2 total, 0 dead)

 

Name: 192.168.2.101:50010

Decommission Status : Normal

Configured Capacity: 22851047424 (21.28 GB)

DFS Used: 135168 (132 KB)

Non DFS Used: 20131606528 (18.75 GB)

DFS Remaining: 2719305728(2.53 GB)

DFS Used%: 0%

DFS Remaining%: 11.9%

Last contact: Tue Dec 25 09:40:14 CST 2012

 

 

Name: 192.168.2.102:50010

Decommission Status : Normal

Configured Capacity: 22851047424 (21.28 GB)

DFS Used: 135168 (132 KB)

Non DFS Used: 22007869440 (20.5 GB)

DFS Remaining: 843042816(803.99 MB)

DFS Used%: 0%

DFS Remaining%: 3.69%

Last contact: Tue Dec 25 09:40:13 CST 2012

--启动Hbase集群

----在gc master节点

[grid@gc ~]$ hbase-0.90.5/bin/start-hbase.sh

rac2: starting zookeeper, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-zookeeper-rac2.localdomain.out

gc: starting zookeeper, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-zookeeper-gc.localdomain.out

rac1: starting zookeeper, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-zookeeper-rac1.localdomain.out

starting master, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-master-gc.localdomain.out

rac1: starting regionserver, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-regionserver-rac1.localdomain.out

rac2: starting regionserver, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-regionserver-rac2.localdomain.out

--可以看到多出两个hbase进程

[grid@gc ~]$ jps

2718 HQuorumPeer

6875 JobTracker

6799 SecondaryNameNode

8129 org.eclipse.equinox.launcher_1.1.1.R36x_v20101122_1400.jar

2864 Jps

6651 NameNode

2772 HMaster

--rac1,rac2 slave节点

[grid@rac1 ~]$ jps

23663 HRegionServer

3736 DataNode

23585 HQuorumPeer

23737 Jps

3840 TaskTracker

[grid@rac2 ~]$ jps

10579 TaskTracker

29735 HQuorumPeer

29897 Jps

10480 DataNode

29812 HRegionServer

--通过浏览器验证:

http://192.168.2.100:60010/master.jsp

--关闭hbase集群

[grid@gc hbase-0.90.5]$ bin/stop-hbase.sh

stopping hbase...................

gc: stopping zookeeper.

rac2: stopping zookeeper.

rac1: stopping zookeeper.

命令行操作：

1. 常用hbase命令

--进入habase

[grid@gc ~]$ hbase-0.90.5/bin/hbase shell

HBase Shell; enter 'help' for list of supported commands.

Type "exit" to leave the HBase Shell

Version 0.90.5, r1212209, Fri Dec 9 05:40:36 UTC 2011

hbase(main):001:0>

--查看数据库状态

hbase(main):002:0> status

2 servers, 0 dead, 1.0000 average load

--查询数据库版本

hbase(main):004:0> version

0.90.5, r1212209, Fri Dec 9 05:40:36 UTC 2011

--帮助命令

hbase(main):003:0> help

HBase Shell, version 0.90.5, r1212209, Fri Dec 9 05:40:36 UTC 2011

Type 'help "COMMAND"', (e.g. 'help "get"' -- the quotes are necessary) for help on a specific command.

Commands are grouped. Type 'help "COMMAND_GROUP"', (e.g. 'help "general"') for help on a command group.

 

COMMAND GROUPS:

Group name: general

Commands: status, version

 

Group name: ddl

Commands: alter, create, describe, disable, drop, enable, exists, is_disabled, is_enabled, list

 

Group name: dml

Commands: count, delete, deleteall, get, get_counter, incr, put, scan, truncate

 

Group name: tools

Commands: assign, balance_switch, balancer, close_region, compact, flush, major_compact, move, split, unassign, zk_dump

 

Group name: replication

Commands: add_peer, disable_peer, enable_peer, remove_peer, start_replication, stop_replication

 

SHELL USAGE:

Quote all names in HBase Shell such as table and column names. Commas delimit

command parameters. Type after entering a command to run it.

Dictionaries of configuration used in the creation and alteration of tables are

Ruby Hashes. They look like this:

 

{'key1' => 'value1', 'key2' => 'value2', ...}

 

and are opened and closed with curley-braces. Key/values are delimited by the

'=>' character combination. Usually keys are predefined constants such as

NAME, VERSIONS, COMPRESSION, etc. Constants do not need to be quoted. Type

'Object.constants' to see a (messy) list of all constants in the environment.

 

If you are using binary keys or values and need to enter them in the shell, use

double-quote'd hexadecimal representation. For example:

 

hbase> get 't1', "key\x03\x3f\xcd"

hbase> get 't1', "key\003\023\011"

hbase> put 't1', "test\xef\xff", 'f1:', "\x01\x33\x40"

 

The HBase shell is the (J)Ruby IRB with the above HBase-specific commands added.

For more on the HBase Shell, see http://hbase.apache.org/docs/current/book.html

2. Hbase数据库操作命令

--创建表

resume表逻辑模型：

行键	时间戳	列族binfo	列族edu	列族work
lichangzai	T2	binfo:age=’1980-1-1’
	T3	binfo:sex=’man’
	T5		edu:mschool=’rq no.1’
	T6		edu:university=’qhddx’
	T7			work:company1=’12580’
changfei	T10	binfo:age=’1986-2-1’
	T11		edu:university=’bjdx’
	T12			work:company1=’LG’
……	Tn

--创建表

hbase(main):005:0> create 'resume','binfo','edu','work'

0 row(s) in 16.5710 seconds

--列出表

hbase(main):006:0> list

TABLE

resume

1 row(s) in 1.6080 seconds

--查看表结构

hbase(main):007:0> describe 'resume'

DESCRIPTION ENABLED

{NAME => 'resume', FAMILIES => [{NAME => 'binfo', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', C true

OMPRESSION => 'NONE', VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'fals

e', BLOCKCACHE => 'true'}, {NAME => 'edu', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', COMPRESS

ION => 'NONE', VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLO

CKCACHE => 'true'}, {NAME => 'work', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', COMPRESSION =>

'NONE', VERSIONS => '3', TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACH

E => 'true'}]}

1 row(s) in 1.8590 seconds

--添加列族

hbase(main):014:0> disable 'resume'

0 row(s) in 4.2630 seconds

hbase(main):015:0> alter 'resume',name='f1'

0 row(s) in 4.6990 seconds

--删除列族

hbase(main):017:0> alter 'resume',{NAME=>'f1',METHOD=>'delete'}

0 row(s) in 1.1390 seconds

--或是

hbase(main):021:0> alter 'resume','delete' => 'f1'

0 row(s) in 1.9310 seconds

hbase(main):022:0> enable 'resume'

0 row(s) in 5.9060 seconds

注意：

（1） ddl命令是区分大小写的，像ddl中的alter,create, drop, enable等都必需用小写。而{}中的属性名都必需用大写。

（2） alter、drop表之前必需在先禁用(disabel)表，修改完后再启用表(enable)表，否则会报错

--查询禁用状态

hbase(main):024:0> is_disabled 'resume'

false

0 row(s) in 0.4930 seconds

 

hbase(main):021:0> is_enabled 'resume'

true

0 row(s) in 0.2450 seconds

--删除表

hbase(main):015:0> create 't1','f1'

0 row(s) in 15.3730 seconds

 

hbase(main):016:0> disable 't1'

0 row(s) in 6.4840 seconds

 

hbase(main):017:0> drop 't1'

0 row(s) in 7.3730 seconds

--查询表是否存在

hbase(main):018:0> exists 'resume'

Table resume does exist

0 row(s) in 2.3900 seconds

 

hbase(main):019:0> exists 't1'

Table t1 does not exist

0 row(s) in 1.3270 seconds

--插入数据

put 'resume','lichangzai','binfo:age','1980-1-1'

put 'resume','lichangzai','binfo:sex','man'

put 'resume','lichangzai','edu:mschool','rq no.1'

put 'resume','lichangzai','edu:university','qhddx'

put 'resume','lichangzai','work:company1','12580'

put 'resume','lichangzai','work:company2','china mobile'

put 'resume','lichangzai','binfo:site','blog.csdn.net/lichangzai'

put 'resume','lichangzai','binfo:mobile','13712345678'

put 'resume','changfei','binfo:age','1986-2-1'

put 'resume','changfei','edu:university','bjdx'

put 'resume','changfei','work:company1','LG'

put 'resume','changfei','binfo:mobile','13598765401'

put 'resume','changfei','binfo:site','hi.baidu/lichangzai'

--获取一行键的所有数据

hbase(main):014:0> get 'resume','lichangzai'

COLUMN CELL

binfo:age timestamp=1356485720612, value=1980-1-1

binfo:mobile timestamp=1356485865523, value=13712345678

binfo:sex timestamp=1356485733603, value=man

binfo:site timestamp=1356485859806, value=blog.csdn.net/lichangzai

edu:mschool timestamp=1356485750361, value=rq no.1

edu:university timestamp=1356485764211, value=qhddx

work:company1 timestamp=1356485837743, value=12580

work:company2 timestamp=1356485849365, value=china mobile

8 row(s) in 2.1090 seconds

注意：必须通过行键Row Key来查询数据

--获取一个行键，一个列族的所有数据

hbase(main):015:0> get 'resume','lichangzai','binfo'

COLUMN CELL

binfo:age timestamp=1356485720612, value=1980-1-1

binfo:mobile timestamp=1356485865523, value=13712345678

binfo:sex timestamp=1356485733603, value=man

binfo:site timestamp=1356485859806, value=blog.csdn.net/lichangzai

4 row(s) in 1.6010 seconds

--获取一个行键，一个列族中一个列的所有数据

hbase(main):017:0> get 'resume','lichangzai','binfo:sex'

COLUMN CELL

binfo:sex timestamp=1356485733603, value=man

1 row(s) in 0.8980 seconds

--更新一条记录

hbase(main):018:0> put 'resume','lichangzai','binfo:mobile','13899999999'

0 row(s) in 1.7640 seconds

 

hbase(main):019:0> get 'resume','lichangzai','binfo:mobile'

COLUMN CELL

binfo:mobile timestamp=1356486691591, value=13899999999

1 row(s) in 1.5710 seconds

注意：更新实质就是插入一条带有时间戳的记录，get查询时只显示最新时间的记录

--通过timestamp来获取数据

------查询最新的时间戳的数据

hbase(main):020:0> get 'resume','lichangzai',{COLUMN=>'binfo:mobile',TIMESTAMP=>1356486691591}

COLUMN CELL

binfo:mobile timestamp=1356486691591, value=13899999999

1 row(s) in 0.4060 seconds

------查之前（即删除）时间戳的数据

hbase(main):021:0> get 'resume','lichangzai',{COLUMN=>'binfo:mobile',TIMESTAMP=>1356485865523}

COLUMN CELL

binfo:mobile timestamp=1356485865523, value=13712345678

1 row(s) in 0.7780 seconds

--全表扫描

hbase(main):022:0> scan 'resume'

ROW COLUMN+CELL

changfei column=binfo:age, timestamp=1356485874056, value=1986-2-1

changfei column=binfo:mobile, timestamp=1356485897477, value=13598765401

changfei column=binfo:site, timestamp=1356485906106, value=hi.baidu/lichangzai

changfei column=edu:university, timestamp=1356485880977, value=bjdx

changfei column=work:company1, timestamp=1356485888939, value=LG

lichangzai column=binfo:age, timestamp=1356485720612, value=1980-1-1

lichangzai column=binfo:mobile, timestamp=1356486691591, value=13899999999

lichangzai column=binfo:sex, timestamp=1356485733603, value=man

lichangzai column=binfo:site, timestamp=1356485859806, value=blog.csdn.net/lichangzai

lichangzai column=edu:mschool, timestamp=1356485750361, value=rq no.1

lichangzai column=edu:university, timestamp=1356485764211, value=qhddx

lichangzai column=work:company1, timestamp=1356485837743, value=12580

lichangzai column=work:company2, timestamp=1356485849365, value=china mobile

2 row(s) in 3.6300 seconds

--删除指定行键的列族字段

hbase(main):023:0> put 'resume','changfei','binfo:sex','man'

0 row(s) in 1.2630 seconds

 

hbase(main):024:0> delete 'resume','changfei','binfo:sex'

0 row(s) in 0.5890 seconds

 

hbase(main):026:0> get 'resume','changfei','binfo:sex'

COLUMN CELL

0 row(s) in 0.5560 seconds

--删除整行

hbase(main):028:0> create 't1','f1','f2'

0 row(s) in 8.3950 seconds

 

hbase(main):029:0> put 't1','a','f1:col1','xxxxx'

0 row(s) in 2.6790 seconds

 

hbase(main):030:0> put 't1','a','f1:col2','xyxyx'

0 row(s) in 0.5130 seconds

 

hbase(main):031:0> put 't1','b','f2:cl1','ppppp'

0 row(s) in 1.2620 seconds

 

hbase(main):032:0> deleteall 't1','a'

0 row(s) in 1.2030 seconds

 

hbase(main):033:0> get 't1','a'

COLUMN CELL

0 row(s) in 0.8980 seconds

--查询表中有多少行

hbase(main):035:0> count 'resume'

2 row(s) in 2.8150 seconds

hbase(main):036:0> count 't1'

1 row(s) in 0.9500 seconds

--清空表

hbase(main):037:0> truncate 't1'

Truncating 't1' table (it may take a while):

- Disabling table...

- Dropping table...

- Creating table...

0 row(s) in 21.0060 seconds

注意：Truncate表的处理过程：由于Hadoop的HDFS文件系统不允许直接修改，所以只能先删除表在重新创建已达到清空表的目的

3.

遇到的问题

问题：
在刚配置完成hbase安装后，各节点进程还正常，可是过一小段时间后，master节点的HMaster进程就自已停止了。

之后再重新启动master节点后，就出现了下面的问题

--master节点缺少HMaster进程
[grid@gc bin]$ ./start-hbase.sh
rac1: starting zookeeper, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-zookeeper-rac1.localdomain.out
rac2: starting zookeeper, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-zookeeper-rac2.localdomain.out
gc: starting zookeeper, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-zookeeper-gc.localdomain.out
starting master, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-master-gc.localdomain.out
rac2: starting regionserver, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-regionserver-rac2.localdomain.out
rac1: starting regionserver, logging to /home/grid/hbase-0.90.5/bin/../logs/hbase-grid-regionserver-rac1.localdomain.out
[grid@gc bin]$ jps
3871 NameNode
4075 JobTracker
8853 Jps
4011 SecondaryNameNode
8673 HQuorumPeer

--两slave节点rac1,rac2进程正常
[grid@rac1 bin]$ jps
10353 HQuorumPeer
10576 Jps
6457 DataNode
6579 TaskTracker
10448 HRegionServer
[grid@rac2 ~]$ jps
10311 HQuorumPeer
10534 Jps
6426 DataNode
6546 TaskTracker
10391 HRegionServer

下面是部分日志
--master节点gc的日志
[grid@gc logs]$ tail -100f hbase-grid-master-gc.localdomain.log
2012-12-25 15:23:45,842 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server gc/192.168.2.100:2181
2012-12-25 15:23:45,853 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to gc/192.168.2.100:2181, initiating session
2012-12-25 15:23:45,861 INFO org.apache.zookeeper.ClientCnxn: Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect
2012-12-25 15:23:46,930 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server rac1/192.168.2.101:2181
2012-12-25 15:23:47,167 WARN org.apache.zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
2012-12-25 15:23:48,251 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server rac2/192.168.2.102:2181
2012-12-25 15:23:48,362 INFO org.apache.zookeeper.ZooKeeper: Session: 0x0 closed
2012-12-25 15:23:48,362 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down
2012-12-25 15:23:48,367 ERROR org.apache.hadoop.hbase.master.HMasterCommandLine: Failed to start master
java.lang.RuntimeException: Failed construction of Master: class org.apache.hadoop.hbase.master.HMaster
at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:1065)
at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:142)
at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:102)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:76)
at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1079)
Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase
at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:809)
at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:837)
at org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndFailSilent(ZKUtil.java:931)
at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.(ZooKeeperWatcher.java:134)
at org.apache.hadoop.hbase.master.HMaster.(HMaster.java:219)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:1060)

[grid@gc logs]$ tail -100f hbase-grid-zookeeper-gc.localdomain.log
2012-12-25 15:23:57,380 WARN org.apache.zookeeper.server.quorum.QuorumCnxManager: Cannot open channel to 2 at election address rac2/192.168.2.102:3888
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
at sun.nio.ch.SocketAdaptor.connect(SocketAdaptor.java:100)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:366)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:335)
at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:360)
at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:333)
at java.lang.Thread.run(Thread.java:619)
.......
2012-12-25 15:23:57,670 INFO org.apache.zookeeper.server.ZooKeeperServer: Server environment:user.home=/home/grid
2012-12-25 15:23:57,671 INFO org.apache.zookeeper.server.ZooKeeperServer: Server environment:user.dir=/home/grid/hbase-0.90.5
2012-12-25 15:23:57,679 INFO org.apache.zookeeper.server.ZooKeeperServer: Created server with tickTime 3000 minSessionTimeout 6000 maxSessionTimeout 180000 datadir /home/grid/hbase-0.90.5/zookeeper/version-2 snapdir /home/grid/hbase-0.90.5/zookeeper/version-2
2012-12-25 15:23:58,118 WARN org.apache.zookeeper.server.quorum.Learner: Unexpected exception, tries=0, connecting to rac1/192.168.2.101:2888
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:525)
at org.apache.zookeeper.server.quorum.Learner.connectToLeader(Learner.java:212)
at org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:65)
at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:644) at
2012-12-25 15:24:00,886 INFO org.apache.zookeeper.server.quorum.Learner: Getting a snapshot from leader
2012-12-25 15:24:00,897 INFO org.apache.zookeeper.server.quorum.Learner: Setting leader epoch 9
2012-12-25 15:24:01,051 INFO org.apache.zookeeper.server.persistence.FileTxnSnapLog: Snapshotting: 900000000
2012-12-25 15:24:03,218 INFO org.apache.zookeeper.server.NIOServerCnxn: Accepted socket connection from /192.168.2.101:12397
2012-12-25 15:24:03,377 INFO org.apache.zookeeper.server.NIOServerCnxn: Client attempting to establish new session at /192.168.2.101:12397
2012-12-25 15:24:03,396 WARN org.apache.zookeeper.server.quorum.Learner: Got zxid 0x900000001 expected 0x1
2012-12-25 15:24:03,400 INFO org.apache.zookeeper.server.persistence.FileTxnLog: Creating new log file: log.900000001
2012-12-25 15:24:03,470 INFO org.apache.zookeeper.server.NIOServerCnxn: Established session 0x3bd0f2560e0000 with negotiated timeout 180000 for client /192.168.2.101:12397
2012-12-25 15:24:07,057 INFO org.apache.zookeeper.server.NIOServerCnxn: Accepted socket connection from /192.168.2.102:52300
2012-12-25 15:24:07,690 INFO org.apache.zookeeper.server.NIOServerCnxn: Client attempting to establish new session at /192.168.2.102:52300
2012-12-25 15:24:07,712 INFO org.apache.zookeeper.server.NIOServerCnxn: Established session 0x3bd0f2560e0001 with negotiated timeout 180000 for client /192.168.2.102:52300
2012-12-25 15:24:10,016 INFO org.apache.zookeeper.server.quorum.FastLeaderElection: Notification: 2 (n.leader), 34359738398 (n.zxid), 1 (n.round), LOOKING (n.state), 2 (n.sid), FOLLOWING (my state)
2012-12-25 15:24:30,422 INFO org.apache.zookeeper.server.quorum.FastLeaderElection: Notification: 2 (n.leader), 34359738398 (n.zxid), 2 (n.round), LOOKING (n.state), 2 (n.sid), FOLLOWING (my state)
2012-12-25 15:24:30,423 INFO org.apache.zookeeper.server.quorum.FastLeaderElection: Notification: 2 (n.leader), 34359738398 (n.zxid), 2 (n.round), LOOKING (n.state), 2 (n.sid), FOLLOWING (my state)

--slave节点rac2的日志
[grid@rac2 logs]$ tail -100f hbase-grid-regionserver-rac2.localdomain.log
2012-12-25 15:23:46,939 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server rac1/192.168.2.101:2181
2012-12-25 15:23:47,154 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to rac1/192.168.2.101:2181, initiating session
2012-12-25 15:23:47,453 INFO org.apache.zookeeper.ClientCnxn: Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect
2012-12-25 15:23:47,977 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server gc/192.168.2.100:2181
2012-12-25 15:23:48,354 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to gc/192.168.2.100:2181, initiating session
2012-12-25 15:23:49,583 INFO org.apache.zookeeper.ClientCnxn: Session establishment complete on server gc/192.168.2.100:2181, sessionid = 0x3bd0f2560e0001, negotiated timeout = 180000
2012-12-25 15:23:52,052 INFO org.apache.hadoop.hbase.regionserver.ShutdownHook: Installed shutdown hook thread: Shutdownhook:regionserver60020

解决方法

禁用IPV6，将/etc/hosts文件里面的：：1 localhost那一行删掉重启

[grid@rac1 ~]$ cat /etc/hosts

127.0.0.1 localhost.localdomain localhost

# ::1 localhost6.localdomain6 localhosti6

192.168.2.101 rac1.localdomain rac1
192.168.2.102 rac2.localdomain rac2

192.168.2.100 gc.localdomain gc

Hbase故障解决：

http://wiki.apache.org/hadoop/Hbase/Troubleshooting