hadoop建立兩大錯誤：Bad connection to FS. command aborted. exception和Shutting down NameNode at hadoop

y_keven發表於2014-01-24
HadoopException

1.問題目錄表：

Error程式碼  

1.           Bad connection to FS. command aborted. exception: Call to localhost/127.0.0.1:88  

2.           88 failed on connection exception: java.net.ConnectException: Connection refused  

3.           : no further information    

錯誤提示“Bad connection to FS. command aborted. exception: Call tolocalhost/127.0.0.1:88

88failed on connection exception: java.net.ConnectException: Connection refused

:no further information”

 起初懷疑是fs服務沒有啟動，但反覆關閉啟動多次後仍沒用，請教高手後，被建議重新格式化namenode，就可以了。

格式化指令如下（在hadoop的bin目錄下）：

 

Shell程式碼  

1.           $ ./hadoop namenode -format  

成功之後重啟hadoop就可以了

 

2如果錯誤還存在，那麼手動刪除檔案

 

Error程式碼  

1.           $ bin/hadoop fs -ls /  

2.           11/08/18 17:02:35 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

3.           .1:9000. Already tried 0 time(s).  

4.           11/08/18 17:02:37 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

5.           .1:9000. Already tried 1 time(s).  

6.           11/08/18 17:02:39 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

7.           .1:9000. Already tried 2 time(s).  

8.           11/08/18 17:02:41 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

9.           .1:9000. Already tried 3 time(s).  

10.        11/08/18 17:02:43 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

11.        .1:9000. Already tried 4 time(s).  

12.        11/08/18 17:02:45 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

13.        .1:9000. Already tried 5 time(s).  

14.        11/08/18 17:02:46 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

15.        .1:9000. Already tried 6 time(s).  

16.        11/08/18 17:02:48 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

17.        .1:9000. Already tried 7 time(s).  

18.        11/08/18 17:02:50 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

19.        .1:9000. Already tried 8 time(s).  

20.        11/08/18 17:02:52 INFO ipc.Client: Retrying connect to server: localhost/127.0.0  

21.        .1:9000. Already tried 9 time(s).  

Error程式碼  

1.           Bad connection to FS. command aborted.  

錯誤提示“Bad connection to FS. command aborted.”

 把你DataNode上的DFS資料全刪了，再重新格式化NameNode。

 即：先將你D盤下tmp目錄下所有檔案刪了，在重複上面第一點的過程

 

 

hadoop格式化失敗原因

[root@hadoop home]# hadoop namenode -format
Warning: $HADOOP_HOME is deprecated.


14/01/24 11:41:59 INFO namenode.NameNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = hadoop/192.168.174.174
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 1.1.2
STARTUP_MSG:   build =https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.1 -r 1440782;compiled by 'hortonfo' on Thu Jan 31 02:03:24 UTC 2013
************************************************************/
Re-format filesystem in /usr/java/hadoop/tmp/dfs/name ? (Y or N) y
Format aborted in /usr/java/hadoop/tmp/dfs/name
14/01/24 11:42:04 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hadoop/192.168.174.174
************************************************************/

隨後啟動hadoop,發現http://hdp0:5007無法顯示。

 將cd/usr/java/hadoop/tmp/dfs資料夾整個刪除。然後再格，成功！！！

[root@hadoop dfs]# hadoop namenode -format
Warning: $HADOOP_HOME is deprecated.


14/01/24 11:44:59 INFO namenode.NameNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = hadoop/192.168.174.174
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 1.1.2
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.1-r 1440782; compiled by 'hortonfo' on Thu Jan 31 02:03:24 UTC 2013
************************************************************/
14/01/24 11:44:59 INFO util.GSet: VM type       = 32-bit
14/01/24 11:44:59 INFO util.GSet: 2% max memory = 19.33375 MB
14/01/24 11:44:59 INFO util.GSet: capacity      = 2^22 = 4194304entries
14/01/24 11:44:59 INFO util.GSet: recommended=4194304, actual=4194304
14/01/24 11:45:00 INFO namenode.FSNamesystem: fsOwner=root
14/01/24 11:45:00 INFO namenode.FSNamesystem: supergroup=supergroup
14/01/24 11:45:00 INFO namenode.FSNamesystem: isPermissionEnabled=false
14/01/24 11:45:00 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100
14/01/24 11:45:00 INFO namenode.FSNamesystem: isAccessTokenEnabled=falseaccessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
14/01/24 11:45:00 INFO namenode.NameNode: Caching file names occuring more than10 times 
14/01/24 11:45:00 INFO common.Storage: Image file of size 110 saved in 0seconds.
14/01/24 11:45:00 INFO namenode.FSEditLog: closing edit log: position=4,editlog=/usr/java/hadoop/tmp/dfs/name/current/edits
14/01/24 11:45:00 INFO namenode.FSEditLog: close success: truncate to 4,editlog=/usr/java/hadoop/tmp/dfs/name/current/edits
14/01/24 11:45:01 INFO common.Storage: Storage directory/usr/java/hadoop/tmp/dfs/name has been successfully formatted.
14/01/24 11:45:01 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hadoop/192.168.174.174
************************************************************//************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = hdp0/192.168.221.100
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 0.20.2
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
************************************************************/
11/04/12 15:33:30 INFO namenode.FSNamesystem:fsOwner=hadoop,hadoop,adm,dialout,cdrom,plugdev,lpadmin,admin,sambashare
11/04/12 15:33:30 INFO namenode.FSNamesystem: supergroup=supergroup
11/04/12 15:33:30 INFO namenode.FSNamesystem: isPermissionEnabled=true
11/04/12 15:33:31 INFO common.Storage: Image file of size 96 saved in 0seconds.
11/04/12 15:33:31 INFO common.Storage: Storage directory /home/hadoop/dfs/namehas been successfully formatted.
11/04/12 15:33:31 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hdp0/192.168.221.100
************************************************************/

 


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