3

我正在关注本教程http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/

注意:是的,我知道我确实将 hadoop 安装到 /usr/local/hadoop/hadoop/ 但教程没有

当我运行时:

hduser@ubuntu:~$ /usr/local/hadoop/hadoop/bin/hadoop namenode -format

我明白了

Warning: $HADOOP_HOME is deprecated.

/usr/local/hadoop/hadoop/bin/hadoop: line 320: /usr/lib/jvm/java-6-sun/bin/java: No such  file or directory
/usr/local/hadoop/hadoop/bin/hadoop: line 390: /usr/lib/jvm/java-6-sun/bin/java: No such file or directory

代替

hduser@ubuntu:/usr/local/hadoop$ hadoop/bin/hadoop namenode -format
10/05/08 16:59:56 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = ubuntu/127.0.1.1
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 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
************************************************************/
10/05/08 16:59:56 INFO namenode.FSNamesystem: fsOwner=hduser,hadoop
10/05/08 16:59:56 INFO namenode.FSNamesystem: supergroup=supergroup
10/05/08 16:59:56 INFO namenode.FSNamesystem: isPermissionEnabled=true
10/05/08 16:59:56 INFO common.Storage: Image file of size 96 saved in 0 seconds.
10/05/08 16:59:57 INFO common.Storage: Storage directory .../hadoop-hduser/dfs/name has    been successfully formatted.
10/05/08 16:59:57 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at ubuntu/127.0.1.1
************************************************************/

在 /usr/local/hadoop/hadoop/bin/hadoop 行 320 的代码中是:

JAVA_PLATFORM=`CLASSPATH=${CLASSPATH} ${JAVA} -Xmx32m ${HADOOP_JAVA_PLATFORM_OPTS}           
org.apache.hadoop.util.PlatformName | sed -e "s/ /_/g"`

第 390 行是:

    exec "$JAVA" -Dproc_$COMMAND $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"

知道如何解决这个问题吗?

4

2 回答 2

2

我有以下文件:/usr/lib/hadoop-0.20/bin/hadoop-config.sh(Cloudera 安装)

在这里,我可以看到它在以下位置搜索 java:

# attempt to find java
if [ -z "$JAVA_HOME" ]; then
  for candidate in \
    /usr/lib/jvm/java-6-sun \
    /usr/lib/jvm/java-1.6.0-sun-1.6.0.*/jre/ \
    /usr/lib/jvm/java-1.6.0-sun-1.6.0.* \
    /usr/lib/j2sdk1.6-sun \
    /usr/java/jdk1.6* \
    /usr/java/jre1.6* \
    /Library/Java/Home \
    /usr/java/default \
    /usr/lib/jvm/default-java ; do
    if [ -e $candidate/bin/java ]; then
      export JAVA_HOME=$candidate
      break
    fi
  done

您的 JAVA_HOME 设置是否正确?你可以手动设置它然后尝试再次运行它。

[编辑:基于评论]

  1. 检查是否设置了 JAVA_HOME: echo $JAVA_HOME
  2. 找出你的 jvm 所在的位置,通常在:/usr/lib/jvm/java-6-sun/
  3. 然后设置它。编辑 bashrc 和 bash_profile:vi ~/.bashrcvi ~/.bash_profile
  4. 添加以下内容:export JAVA_HOME=/usr/lib/jvm/java-6-sun/
  5. 请注意,路径应基于您找到 jvm 的位置。
于 2012-06-28T22:08:20.833 回答
1

JAVA_HOME通过将此行添加到hadoop/bin文件 hadoop(在上面的给定路径中)中,将您重置为具有 java 的目录:

export JAVA_HOME=/home/hduser/jdk1.7.0_07
于 2012-10-07T11:30:31.847 回答