ubuntu@onlinelabs-15ae7c187615497fa4d5dc9f62332bae:~$ hdfs dfsadmin -report
OpenJDK Zero VM warning: You have loaded library /usr/local/hadoop/hadoop-2.2.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
15/01/09 16:53:52 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
report: Call From onlinelabs-15ae7c187615497fa4d5dc9f62332bae/10.1.8.95 to onlinelabs-15ae7c187615497fa4d5dc9f62332bae:9000 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused