當(dāng)我們打開系統(tǒng)輸入hadoop啟動(dòng)命令start-all.sh時(shí)出現(xiàn)以下錯(cuò)誤：

按需定制網(wǎng)站可以根據(jù)自己的需求進(jìn)行定制，成都做網(wǎng)站、成都網(wǎng)站制作構(gòu)思過程中功能建設(shè)理應(yīng)排到主要部位公司成都做網(wǎng)站、成都網(wǎng)站制作的運(yùn)用實(shí)際效果公司網(wǎng)站制作網(wǎng)站建立與制做的實(shí)際意義

[root@master ~]# start-all.sh
starting namenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-namenode-master.out
master: ssh: connect to host master port 22: Network is unreachable
master: ssh: connect to host master port 22: Network is unreachable
starting jobtracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-jobtracker-master.out
master: ssh: connect to host master port 22: Network is unreachable

我們查看進(jìn)程：

[root@master ~]# jps
2739 Jps
[root@master ~]#

顯示我們hadoop沒有啟動(dòng)。

我的解決方法：

我們先查看我們當(dāng)前虛擬機(jī)系統(tǒng)的ip為192.168.40.128,

[root@master ~]# ifconfig
eth2      Link encap:Ethernet  HWaddr 00:0C:29:4E:BC:7A  
          inet addr:192.168.40.128  Bcast:192.168.40.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe4e:bc7a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:127 errors:0 dropped:0 overruns:0 frame:0
          TX packets:134 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:12497 (12.2 KiB)  TX bytes:14291 (13.9 KiB)
          Interrupt:19 Base address:0x2024 
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:24 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1616 (1.5 KiB)  TX bytes:1616 (1.5 KiB)

然后我們編輯查看/etc/hosts文件里的配置：

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.80.100 master#hadoop的ip配置
~                                                                                           
~                                                                                           
~                                                                                                                                                                                 
                                                                                         
"/etc/hosts" 3L, 180C

我們可以看到master,hadoop的ip配置為：192.168.80.100，與當(dāng)前系統(tǒng)的ip不一致。鍵盤按i編輯修改ip為當(dāng)前系統(tǒng)ip（192.168.40.128），按esc輸入:wq退出保存。然后重新啟動(dòng)start-all.sh

[root@master ~]# start-all.sh
starting namenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-namenode-master.out
master: Warning: Permanently added the RSA host key for IP address '192.168.40.128' to the list of known hosts.
master: starting datanode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-datanode-master.out
master: starting secondarynamenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-secondarynamenode-master.out
starting jobtracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-jobtracker-master.out
master: starting tasktracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-tasktracker-master.out

啟動(dòng)成功，查看進(jìn)程

[root@master ~]# jps
3065 SecondaryNameNode
3400 Jps
3146 JobTracker
2951 DataNode
2843 NameNode
3260 TaskTracker

成功

文章題目：hadoop啟動(dòng)start-all.sh出錯(cuò)（master:ssh:connecttohostmasterport22:Connectionrefused）
轉(zhuǎn)載注明：http://weahome.cn/article/jcsdjo.html