【发布时间】：2016-05-27 20:13:30
【问题描述】：
我想我已经正确安装了 hadoop。如果我做jps我可以看到namenode和datanode，没问题。
当我输入 hadoop fs -ls . 时，我得到了错误：
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /opt/db/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
14/08/08 12:42:44 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
ls: '.': No such file or directory
当我输入 hadoop dfs -ls . 时，我得到了错误：
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /opt/db/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
14/08/08 12:43:27 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
ls: '.': No such file or directory
当我输入 hadoop hdfs -ls . 时，我得到了错误：
Error: Could not find or load main class hdfs
这与我是否输入'.'无关或“/”或我所在的任何目录。
这一切意味着什么？如何获得正常的预期输出？我错过了什么？
【问题讨论】：
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export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib" 在 .bashrc 中添加这两行并重新打开终端并尝试重新启动 hadoop。
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你重启了hadoop了吗？
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哦...不，我会那样做。我意识到它无论如何都消除了警告，这很棒！我现在重新开始
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试试
hadoop dfs -ls / -
好的，如果我尝试 'hadoop dfs -ls /' 我会得到以下信息：
DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. 14/08/08 12:59:47 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable