hadoop的datanode没有启动 [英] hadoop's datanode is not starting

问题描述

我正在使用ubuntu 14.04 LTS Java版本8和Hadoop 2.5.1进行安装。我遵循此指南以安装所有组件。对不起，不使用迈克尔诺尔的。
现在我面对的问题是当我做start-dfs.sh时，我收到以下消息

  oroborus @ Saras-Dell-System-XPS-L502X：〜$ start-dfs.sh< br> 
 14/11/12 16:12:33 WARN util.NativeCodeLoader：无法为您的平台加载native-hadoop库......在适用的情况下使用builtin-java类< br> 
在[localhost]上启动namenodes< br> 
 localhost：启动namenode，记录到/usr/local/hadoop/logs/hadoop-oroborus-namenode-Saras-Dell-System-XPS-L502X.out<br> 
 localhost：启动datanode，记录到/usr/local/hadoop/logs/hadoop-oroborus-datanode-Saras-Dell-System-XPS-L502X.out<br> 
启动辅助名称节点[0.0.0.0]< br> 
 0.0.0.0：启动secondarynamenode，记录到/usr/local/hadoop/logs/hadoop-oroborus-secondarynamenode-Saras-Dell-System-XPS-L502X.out<br> 
 14/11/12 16:12:48 WARN util.NativeCodeLoader：无法为您的平台加载native-hadoop库......在适用的情况下使用builtin-java类< br> 
  

现在运行start-yarn.sh（这似乎工作正常）和jps我得到以下输出

  oroborus @ Saras-Dell-System-XPS-L502X：〜$ jps 
 9090 NodeManager 
 5107 JobHistoryServer 
 8952 ResourceManager 
 12442 Jps 
 11981 NameNode 
  

<理想的输出应该有datanode，但它不存在。搜索一下，发现有一点我发现这个错误是在日志中，所以这里是datanode的日志（只有错误部分，如果你需要更多的让我知道）

  2014-11-08 23：30：32,709 INFO org.apache.hadoop.hdfs.server.datanode.DataNode：[TERM，HUP，INT]的注册UNIX信号处理程序
 2014-11-08 23:30:33,132 WARN org.apache.hadoop.hdfs.server.datanode.DataNode：无效dfs.datanode.data.dir / usr / local / hadoop_store / hdfs / datanode：
 EPERM：操作不允许
在org.apache.hadoop.io.nativeio.NativeIO $ POSIX.chmodImpl（本地方法）
在org.apache.hadoop.io.nativeio.NativeIO $ POSIX.chmod （NativeIO.java:226）
 at org.apache.hadoop.fs.RawLocalFileSystem.setPermission（RawLocalFileSystem.java:642）
 at org.apache.hadoop.fs.FilterFileSystem.setPermission（FilterFileSystem.java ：472）
 at org.apache.hadoop.util.DiskChecker.mkdirsWithExistsAndPermissionCheck（DiskChecker.java:126）
 at org.a pache.hadoop.util.DiskChecker.checkDir（DiskChecker.java:142）
 at org.apache.hadoop.hdfs.server.datanode.DataNode $ DataNodeDiskChecker.checkDir（DataNode.java:1866）
 at org.apache.hadoop.hdfs.server.datanode.DataNode.checkStorageLocations（DataNode.java:1908）
 at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance（DataNode.java:1890）
 at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode（DataNode.java:1782）
 at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode（DataNode.java ：1829）
 at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain（DataNode.java:2005）
 at org.apache.hadoop.hdfs.server.datanode.DataNode.main （DataNode.java:2029）
 2014-11-08 23：30：33,134 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode：secureMain中的异常
 java.io.IOException：All dfs.datanode.data.dir中的目录无效：/ usr / local / hadoop_store / hdfs / datanode /
在org.apache.hadoop.hdfs.server.datanode.DataNode.checkStorageLocations（DataNode.java:1917）
  

<现在我的疑问是如何使其有效。

帮助表示赞赏。

P.S.我尝试了很多论坛，所以没有人可以给我解决这个问题。

解决方案

首先删除hdfs文件夹中的所有内容：

< < name> hadoop.tmp.dir< / name>

  rm -rf / usr / local / hadoop_store 
  

确保dir拥有正确的所有者和权限/ usr / local / hadoop_store

  hduser @ localhost $ sudo chown hduser：hadoop -R / usr / local / hadoop_store 
 hduser @ localhost $ sudo chmod 777 -R / usr / local / hadoop_store 
  

格式化namenode：

  hduser @ localhost $ hadoop namenode -format 
  

再次启动所有流程

I am using ubuntu 14.04 LTS Java version 8 and Hadoop 2.5.1 for installation. I followed this guide to install all the components. Sorry for not using michael noll's. Now the problem that i face is when i do start-dfs.sh i get the following message

oroborus@Saras-Dell-System-XPS-L502X:~$ start-dfs.sh <br>
14/11/12 16:12:33 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable<br>
Starting namenodes on [localhost]<br>
localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-oroborus-namenode-Saras-Dell-System-XPS-L502X.out<br>
localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-oroborus-datanode-Saras-Dell-System-XPS-L502X.out<br>
Starting secondary namenodes [0.0.0.0]<br>
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-oroborus-secondarynamenode-Saras-Dell-System-XPS-L502X.out<br>
14/11/12 16:12:48 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable<br>

Now after running start-yarn.sh(which seems to work fine) and jps i get the following output

oroborus@Saras-Dell-System-XPS-L502X:~$ jps
9090 NodeManager
5107 JobHistoryServer
8952 ResourceManager
12442 Jps
11981 NameNode

The ideal output should have datanode in it, but it is not there. Googling and SOing a bit i found out the error is looged in the logs so here are the logs for datanode.(Only error part if you need more let me know)

    2014-11-08 23:30:32,709 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: registered UNIX signal handlers for [TERM, HUP, INT]
2014-11-08 23:30:33,132 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Invalid dfs.datanode.data.dir /usr/local/hadoop_store/hdfs/datanode :
EPERM: Operation not permitted
        at org.apache.hadoop.io.nativeio.NativeIO$POSIX.chmodImpl(Native Method)
        at org.apache.hadoop.io.nativeio.NativeIO$POSIX.chmod(NativeIO.java:226)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:642)
        at org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:472)
        at org.apache.hadoop.util.DiskChecker.mkdirsWithExistsAndPermissionCheck(DiskChecker.java:126)
        at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:142)
        at org.apache.hadoop.hdfs.server.datanode.DataNode$DataNodeDiskChecker.checkDir(DataNode.java:1866)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.checkStorageLocations(DataNode.java:1908)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1890)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1782)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1829)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2005)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2029)
2014-11-08 23:30:33,134 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain
java.io.IOException: All directories in dfs.datanode.data.dir are invalid: "/usr/local/hadoop_store/hdfs/datanode/"
        at org.apache.hadoop.hdfs.server.datanode.DataNode.checkStorageLocations(DataNode.java:1917)

Now my doubt is how to make it valid.

Help is appreciated.
P.S. I tried a lot of forums, SO post none of them could give me solution to this problem. Hence the question.

解决方案

First delete all contents from hdfs folder:

Value of <name>hadoop.tmp.dir</name>

rm -rf /usr/local/hadoop_store

Make sure that dir has right owner and permission /usr/local/hadoop_store

hduser@localhost$sudo chown hduser:hadoop -R /usr/local/hadoop_store
hduser@localhost$sudo chmod 777 -R /usr/local/hadoop_store

Format the namenode:

hduser@localhost$hadoop namenode -format

Start all processes again

这篇关于hadoop的datanode没有启动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！