Question

我在笔记本电脑的单人模式中设置了一个hadoop。 info：Ubuntu 12.10，jdk 1.7 oracle，从.deb文件安装hadoop。地点：在/ etc / Hadoop的的/ usr /共享/ hadoop的

我在/usr/share/hadoop/templates/conf/core-site.xml中配置我添加了2个属性

    <property>
  <name>hadoop.tmp.dir</name>
  <value>/app/hadoop/tmp</value>
  <description>A base for other temporary directories.</description>
</property>

<property>
  <name>fs.default.name</name>
  <value>hdfs://localhost:9000</value>
  <description>The name of the default file system.  A URI whose
  scheme and authority determine the FileSystem implementation.  The
  uri's scheme determines the config property (fs.SCHEME.impl) naming
  the FileSystem implementation class.  The uri's authority is used to
  determine the host, port, etc. for a filesystem.</description>
</property>

在hdfs-site.xml

中

<property>
  <name>dfs.replication</name>
  <value>1</value>
  <description>Default block replication.
  The actual number of replications can be specified when the file is created.
  The default is used if replication is not specified in create time.
  </description>
</property>

在mapred-site.xml中

    <property>
  <name>mapred.job.tracker</name>
  <value>localhost:9001</value>
  <description>The host and port that the MapReduce job tracker runs
  at.  If "local", then jobs are run in-process as a single map
  and reduce task.
  </description>
</property>

当我从命令开始 hduser @ sepdau：〜$ start-all.sh

starting namenode, logging to /var/log/hadoop/hduser/hadoop-hduser-namenode-sepdau.com.out
localhost: starting datanode, logging to /var/log/hadoop/hduser/hadoop-hduser-datanode-sepdau.com.out
localhost: starting secondarynamenode, logging to /var/log/hadoop/hduser/hadoop-hduser-secondarynamenode-sepdau.com.out
starting jobtracker, logging to /var/log/hadoop/hduser/hadoop-hduser-jobtracker-sepdau.com.out
localhost: starting tasktracker, logging to /var/log/hadoop/hduser/hadoop-hduser-tasktracker-sepdau.com.out

但是当我按照jps查看流程时

hduser@sepdau:~$ jps
13725 Jps

更多

 root@sepdau:/home/sepdau# netstat -plten | grep java
tcp6       0      0 :::8080                 :::*                    LISTEN      117        9953        1316/java       
tcp6       0      0 :::53976                :::*                    LISTEN      117        16755       1316/java       
tcp6       0      0 127.0.0.1:8700          :::*                    LISTEN      1000       786271      8323/java       
tcp6       0      0 :::59012                :::*                    LISTEN      117        16756       1316/java

当我停止--all.sh

    hduser@sepdau:~$ stop-all.sh
no jobtracker to stop
localhost: no tasktracker to stop
no namenode to stop
localhost: no datanode to stop
localhost: no secondarynamenode to stop

在我的主机文件中

hduser@sepdau:~$ cat /etc/hosts

127.0.0.1       localhost
127.0.1.1   sepdau.com



# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

file slave：localhost master：localhost

这是一些日志

    hduser@sepdau:/home/sepdau$ start-all.sh
mkdir: cannot create directory `/var/run/hadoop': Permission denied
starting namenode, logging to /var/log/hadoop/hduser/hadoop-hduser-namenode-sepdau.com.out
/usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-hduser-namenode.pid: No such file or directory
localhost: mkdir: cannot create directory `/var/run/hadoop': Permission denied
localhost: starting datanode, logging to /var/log/hadoop/hduser/hadoop-hduser-datanode-sepdau.com.out
localhost: /usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-hduser-datanode.pid: No such file or directory
localhost: mkdir: cannot create directory `/var/run/hadoop': Permission denied
localhost: starting secondarynamenode, logging to /var/log/hadoop/hduser/hadoop-hduser-secondarynamenode-sepdau.com.out
localhost: /usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-hduser-secondarynamenode.pid: No such file or directory
mkdir: cannot create directory `/var/run/hadoop': Permission denied
starting jobtracker, logging to /var/log/hadoop/hduser/hadoop-hduser-jobtracker-sepdau.com.out
/usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-hduser-jobtracker.pid: No such file or directory
localhost: mkdir: cannot create directory `/var/run/hadoop': Permission denied
localhost: starting tasktracker, logging to /var/log/hadoop/hduser/hadoop-hduser-tasktracker-sepdau.com.out
localhost: /usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-hduser-tasktracker.pid: No such file or directory

我使用root用户，但它有同样的问题

我在这里错了。如何使用hadoop插件连接到eclipse。感谢提前

Answer 1

尝试添加

<property>
  <name>dfs.name.dir</name>
   <value>/home/abhinav/hdfs</value>
 </property>

到hdfs-site.xml并确保它存在

我为此写了一个小教程。看看这有助于http://blog.abhinavmathur.net/2013/01/experience-with-setting-multinode.html

Answer 2

您可以通过编辑文件hadoop-env.sh来添加pid和创建日志的路径。该文件存储在conf文件夹中。

export HADOOP_LOG_DIR=/home/username/hadoop-1x/logs

export HADOOP_PID_DIR=/home/username/pids

Answer 3

修改你的hdfs-site.xml

<property>
  <name>dfs.name.dir</name>
  <value>/home/user_to_run_hadoop/hdfs/name</value>
</property>

<property>
  <name>dfs.data.dir</name>
  <value>/home/user_to_run_hadoop/hdfs/data</value>
</property>

确保在hdfs创建目录/home/user_to_run_hadoop。然后在name

上创建2个目录data和hdfs

之后，您需要chmod -R 755 ./hdfs/和path_to_hadoop_home/bin/hadoop namenode -format

Answer 4

重新启动终端，首先格式化NameNode。

有些罕见的情况有人更改了Hadoop中Bin文件夹中的Start-all.sh文件。检查一次。

检查一次bashrc文件配置是否合适？

Hadoop错误无法启动--all.sh

4 个答案: