hadoop 2.2 - datanode不啓動

Question

我今天早上有Hadoop 2.4（請參閱我以前的2個問題）。現在我刪除它，並安裝2.2，因爲我有問題與2.4，也因爲我認爲2.2是最新的穩定版本。現在，我也跟着教程這裏：

http://codesfusion.blogspot.com/2013/10/setup-hadoop-2x-220-on-ubuntu.html?m=1

我敢肯定我做的一切都是正確的，但我又面臨着類似的問題。

當我運行jps時，顯然數據節點沒有啓動。

我又在做什麼錯了？

任何幫助將不勝感激。

hduser@test02:~$ start-dfs.sh 
14/06/06 18:12:45 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 
Incorrect configuration: namenode address dfs.namenode.servicerpc-address or dfs.namenode.rpc-address is not configured. 
Starting namenodes on [] 
localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-hduser-namenode-test02.out 
localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-hduser-datanode-test02.out 
localhost: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. 
localhost: It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'. 
Starting secondary namenodes [0.0.0.0] 
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-hduser-secondarynamenode-test02.out 
0.0.0.0: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. 
0.0.0.0: It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'. 
14/06/06 18:13:01 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 
hduser@test02:~$ jps 
2201 Jps 
hduser@test02:~$ jps 
2213 Jps 
hduser@test02:~$ start-yarn 
start-yarn: command not found 
hduser@test02:~$ start-yarn.sh 
starting yarn daemons 
starting resourcemanager, logging to /usr/local/hadoop/logs/yarn-hduser-resourcemanager-test02.out 
localhost: starting nodemanager, logging to /usr/local/hadoop/logs/yarn-hduser-nodemanager-test02.out 
hduser@test02:~$ jps 
2498 NodeManager 
2264 ResourceManager 
2766 Jps 
hduser@test02:~$ jps 
2784 Jps 
2498 NodeManager 
2264 ResourceManager 
hduser@test02:~$ jps 
2498 NodeManager 
2264 ResourceManager 
2796 Jps 
hduser@test02:~$ 

Answer 1

我的問題是我從字面上理解了這些教程。

粘貼以下HDFS <configuration>之間
fs.default.name
：//本地主機：9000

我懷疑這是錯誤的，而這樣做，但我還是做到了。
由於core-site.xml文件採用XML格式，因此看起來不正確。
所以實際上，它需要看起來像這樣。

<property> 
<name>fs.default.name</name> 
<value>hdfs://localhost:9000</value> 
</property> 

改變它到這個固定我的問題。

Answer 2

我有類似的問題DataNode沒有啓動。我所做的是重新設置namenode的格式，然後重新啓動集羣。然後，運行jps確認數據節點已啓動。

這可能是由於將HDFS目錄放置在您的「home」目錄（在Linux機器上）引起的，因爲啓動和關閉操作系統會影響這些文件夾（不完全確定如何，但爲了防止此問題出現將來，將HDFS目錄移出主目錄）。

請讓我知道這是否工作。