Hadoop 2.6.2，start-dfs.sh 不启动 jobtacker 和 tasktracker

Question

我安装了 hadoop 单节点，现在我用 start-dfs.sh 命令启动集群。

但是 jobotracker 和 tasktracker 并没有出现在 jps 命令中，所以看起来它们没有启动。

你知道为什么吗？我正在安装版本 2.6.2...

执行命令start-dfs.sh后，出现:

[hadoopadmin@hadoop ~]$ start-dfs.sh
16/03/23 12:17:19 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [localhost]
localhost: starting namenode, logging to /usr/local/hadoop-2.6.2/logs/hadoop-hadoopadmin-namenode-hadoop.out
localhost: starting datanode, logging to /usr/local/hadoop-2.6.2/logs/hadoop-hadoopadmin-datanode-hadoop.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop-2.6.2/logs/hadoop-hadoopadmin-secondarynamenode-hadoop.out
16/03/23 12:17:37 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
[hadoopadmin@hadoop ~]$ jps
2881 DataNode
2758 NameNode
3142 Jps
3039 SecondaryNameNode
[hadoopadmin@hadoop ~]$ 

Answer 1

不再有 JobTracker 和 TaskTracker。我们有 NodeManager 和 resourceManager。这里你只是启动了 dfs 服务，没有启动 yarn 服务，启动 yarn 服务运行 start-yarn.sh 然后只有 yarn 相关的服务会启动。

如果你想启动所有服务运行start-all.sh(不是一个好习惯)