Unable to load native-hadoop library for your platform

[root@localhost ~]# start-dfs.sh 16/08/14 23:26:05 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 16/08/14 23:26:05 WARN hdfs.DFSUtil: Namenode for null remains unresolved for ID null. Check your hdfs-site.xml file to ensure namenodes are configured properly. Starting namenodes on [Hadoop.Master] Hadoop.Master: ssh: Could not resolve hostname hadoop.master: Name or service not known localhost: datanode running as process 13955. Stop it first. Starting secondary namenodes [0.0.0.0] 0.0.0.0: starting secondarynamenode, logging to /usr/hadoop/logs/hadoop-root-secondarynamenode-localhost.localdomain.out 16/08/14 23:26:15 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

centos7 64位安装出现警告，换32位编译可消除