This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
14/07/14 11:24:25 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [localhost]
localhost: namenode running as process 6357. Stop it first.
localhost: starting datanode, logging to /home/hadoop/hadoop-2.4.0/logs/hadoop-root-datanode-master.hadoop.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: secondarynamenode running as process 6637. Stop it first.
14/07/14 11:24:38 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
starting yarn daemons
resourcemanager running as process 6777. Stop it first.
localhost: nodemanager running as process 6880. Stop it first.
start-all.sh这个命令不用了，现在使用start-dfs.sh 和 start-yarn.sh代替start-all.sh命令，可能是因为跟spark里的start-all.sh命令重名了，这是打印的第一行信息的意思；
后面提示的WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable是缺少一个java类库，不影响运行
要解决可以参考
网页链接 里面有解决方法
localhost: namenode running as process 6357. Stop it first.
0.0.0.0: secondarynamenode running as process 6637.
Stop it first.starting yarn daemons
resourcemanager running as process 6777. Stop it first.
localhost: nodemanager running as process 6880. Stop it first.
这些都是因为你之前已经开启了这些服务，正在运行，你再开启就提示你先关闭