hadoop--Unable to load native-hadoop library for your platform解決方法

筆者實驗環境：centos 7.4.1708，hadoop-2.6.0-cdh5.14.2.

執行hadoop命令時出現以下告警，不能載入相關庫：

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

檢查發現本地並沒有庫：

$ 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

進入到hadoop目錄下可以看到/lib/native為空。

需要下載對應版本的庫文件：http://dl.bintray.com/sequenceiq/sequenceiq-bin/

 此處筆者選擇：hadoop-native-64-2.6.0.tar。

下載解壓至/lib/native目錄下：

$ 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

重啟dfs，問題解決：(筆者已經配置好hadoop環境變數，直接運行命令)

$ 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