Hadoop 2.2.0: "имя или услуга неизвестны" Предупреждение

Моя цель - запустить hadoop 2.2.0 на Ubuntu 12.4. я смог это сделать, но когда я выполняю следующую команду: rushi @ubuntu:/usr/local/hadoop $sbin/start-dfs.sh

my dfs запускает namenode, scondarynamenode и также datanode, но проблема в том, что я получаю следующее предупреждение

[email protected]:/usr/local/hadoop$ sbin/start-dfs.sh    
14/01/24 12:05:46 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    Starting namenodes on [Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.2.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
    It highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
    localhost]
    sed: -e expression #1, char 6: unknown option to `s'
    Java: ssh: Could not resolve hostname Java: Name or service not known
    library: ssh: Could not resolve hostname library: Name or service not known
    warning:: ssh: Could not resolve hostname warning:: Name or service not known
    which: ssh: Could not resolve hostname which: Name or service not known
    have: ssh: Could not resolve hostname have: Name or service not known
    might: ssh: Could not resolve hostname might: Name or service not known
    You: ssh: Could not resolve hostname You: Name or service not known
    loaded: ssh: Could not resolve hostname loaded: Name or service not known
    Server: ssh: Could not resolve hostname Server: Name or service not known
    HotSpot(TM): ssh: Could not resolve hostname HotSpot(TM): Name or service not known
    have: ssh: Could not resolve hostname have: Name or service not known
    64-Bit: ssh: Could not resolve hostname 64-Bit: Name or service not known
    VM: ssh: Could not resolve hostname VM: Name or service not known
    disabled: ssh: Could not resolve hostname disabled: Name or service not known
    VM: ssh: Could not resolve hostname VM: Name or service not known
    stack: ssh: Could not resolve hostname stack: Name or service not known
    The: ssh: Could not resolve hostname The: Name or service not known
    fix: ssh: Could not resolve hostname fix: Name or service not known
    try: ssh: Could not resolve hostname try: Name or service not known
    guard.: ssh: Could not resolve hostname guard.: Name or service not known
    to: ssh: Could not resolve hostname to: Name or service not known
    now.: ssh: Could not resolve hostname now.: Name or service not known
    will: ssh: Could not resolve hostname will: Name or service not known
    that: ssh: Could not resolve hostname that: Name or service not known
    stack: ssh: Could not resolve hostname stack: Name or service not known
    the: ssh: Could not resolve hostname the: Name or service not known
    you: ssh: Could not resolve hostname you: Name or service not known
    -c: Unknown cipher type 'cd'
    guard: ssh: Could not resolve hostname guard: Name or service not known
    It's: ssh: Could not resolve hostname It's: Name or service not known
    highly: ssh: Could not resolve hostname highly: Name or service not known
    fix: ssh: Could not resolve hostname fix: Name or service not known
    recommended: ssh: Could not resolve hostname recommended: Name or service not known
    or: ssh: Could not resolve hostname or: Name or service not known
    the: ssh: Could not resolve hostname the: Name or service not known
    library: ssh: Could not resolve hostname library: Name or service not known
    link: ssh: Could not resolve hostname link: Name or service not known
    'execstack: ssh: Could not resolve hostname 'execstack: Name or service not known
    with: ssh: Could not resolve hostname with: Name or service not known
    <libfile>',: ssh: Could not resolve hostname <libfile>',: Name or service not known
    it: ssh: Could not resolve hostname it: Name or service not known
    noexecstack'.: ssh: Could not resolve hostname noexecstack'.: Name or service not known
    with: ssh: Could not resolve hostname with: Name or service not known
    '-z: ssh: Could not resolve hostname '-z: Name or service not known
    localhost: starting namenode, logging to /usr/local/hadoop-2.2.0/logs/hadoop-rushi-namenode-ubuntu.out
    localhost: starting datanode, logging to /usr/local/hadoop-2.2.0/logs/hadoop-rushi-datanode-ubuntu.out
    Starting secondary namenodes [Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.2.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
    It highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
    0.0.0.0

]

В чем может быть проблема и как ее решить? Пожалуйста, помогите мне

Ответ 1

Это те же вопросы, что указаны в этой ссылке. Это было просто спрошено другим способом

После этой ссылки все еще есть шанс получить следующее предупреждение

WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

чтобы устранить это предупреждение, следуйте этой ссылке

Ответ 2

Одна из причин может заключаться в том, что встроенная библиотека по умолчанию в Hadoop построена для 32-разрядных.

Добавьте эти строки в ваш .bashrc или .bash_profile:

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"

Это работало для меня на Ubuntu 12.04.

$HADOOP_INSTALL - это место, где вы устанавливаете Hadoop (обычно это /usr/local/hadoop ).

или даже может быть HADOOP_HOME вместо HADOOP_INSTALL.

Ответ 3

Я думаю, что единственная проблема здесь такая же, как в этом вопросе, поэтому решение тоже одно и то же:

Остановите JVM от печати предупреждения о безопасности стека в stdout/stderr, потому что это то, что прерывает запуск HDFS script.

Сделайте это, заменив строку etc/hadoop/hadoop-env.sh:

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"

с:

export HADOOP_OPTS="$HADOOP_OPTS -XX:-PrintWarnings -Djava.net.preferIPv4Stack=true"

(Это решение найдено на Дневник Sumit Chawla)

Ответ 4

Эта ошибка в основном происходит из-за неправильной конфигурации .bashrc.

добавьте следующий код в ваш .bashrc файл в конце.

#HADOOP VARIABLES START
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
export HADOOP_INSTALL=/usr/local/hadoop
export PATH=$PATH:$HADOOP_INSTALL/bin
export PATH=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_HOME=$HADOOP_INSTALL
export HADOOP_HDFS_HOME=$HADOOP_INSTALL
export YARN_HOME=$HADOOP_INSTALL
export HADOOP_HOME=$HADOOP_INSTALL
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib/native"
#HADOOP VARIABLES END

Чтобы удалить ошибку о хосте. установите сервер apache2. Он сконфигурирует всю базовую конфигурацию localhost.

sudo apt-get install apache2.

проверьте его на этом URL: http://localhost

читайте ниже всю статью для настройки с начала. http://www.bogotobogo.com/Hadoop/BigData_hadoop_Install_on_ubuntu_single_node_cluster.php

Ответ 5

Этот script устарел. Вместо этого используйте start-dfs.sh и start-yarn.sh

попробуйте start-yarn.sh