Hadoop doesn't start Datanode on Ubuntu 15.10

Question

I've installed Hadoop 2.6.0 in single-node mode on Ubuntu 15.10 VM. When I start Hadoop with the command ./start-all.sh all it works but when i launch Jps command I view

31602 NameNode 32453 Jps 32169 NodeManager 32045 ResourceManager

and Datanode hasn't be started.

I note also this warning: "16/01/15 11:18:54 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable"

I report following log file

This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh

Starting namenodes on [localhost] localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-ale-namenode-ale-hadoop.out localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-ale-datanode-ale-hadoop.out Starting secondary namenodes [0.0.0.0] 0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-ale-secondarynamenode-ale-hadoop.out starting yarn daemons starting resourcemanager, logging to /usr/local/hadoop/logs/yarn-ale-resourcemanager-ale-hadoop.out localhost: starting nodemanager, logging to /usr/local/hadoop/logs/yarn-ale-nodemanager-ale-hadoop.out

What is the problem?

Thank you!

Answer 1

Yes, start-all.sh has indeed been deprecated. Instead you must use start-dfs.sh. Also you must not format name node more than once else all the data will go away. You may ignore the above warning and let it use built-in java classes.