hadoop--Unable to load native-hadoop library for your platform解决方法

笔者实验环境：centos 7.4.1708，hadoop-2.6.0-cdh5.14.2.

执行hadoop命令时出现以下告警，不能加载相关库：

warn util.nativecodeloader: unable to load native-hadoop library for your platform... using builtin-java classes where applicable

检查发现本地并没有库：

$ hadoop checknative -a
19/08/30 13:11:53 warn util.nativecodeloader: unable to load native-hadoop library for your platform... using builtin-java classes where applicable
native library checking:
hadoop:  false 
zlib:    false 
snappy:  false 
lz4:     false 
bzip2:   false 
openssl: false 
19/08/30 13:11:53 info util.exitutil: exiting with status 1

进入到hadoop目录下可以看到/lib/native为空。

需要下载对应版本的库文件：

 此处笔者选择：。

下载解压至/lib/native目录下：

$ ll
total 4356
-rw-r--r-- 1 hadoop hadoop 1119486 dec  2  2014 libhadoop.a
-rw-r--r-- 1 hadoop hadoop 1486964 dec  2  2014 libhadooppipes.a
lrwxrwxrwx 1 hadoop hadoop      18 dec  2  2014 libhadoop.so -> libhadoop.so.1.0.0
-rwxr-xr-x 1 hadoop hadoop  671189 dec  2  2014 libhadoop.so.1.0.0
-rw-r--r-- 1 hadoop hadoop  581944 dec  2  2014 libhadooputils.a
-rw-r--r-- 1 hadoop hadoop  359458 dec  2  2014 libhdfs.a
lrwxrwxrwx 1 hadoop hadoop      16 dec  2  2014 libhdfs.so -> libhdfs.so.0.0.0
-rwxr-xr-x 1 hadoop hadoop  228435 dec  2  2014 libhdfs.so.0.0.0

重启dfs，问题解决：(笔者已经配置好hadoop环境变量，直接运行命令)

$ start-dfs.sh
$ hdfs dfs -ls /
found 2 items
drwxr-xr-x   - hadoop supergroup          0 2019-08-29 15:08 /test
drwx------   - hadoop supergroup          0 2019-08-29 15:08 /tmp