"This error could be due to wrong JDK package.
Hadoop runs on 64 bit ..so try to uninstall 32bit JDK and install 64 bit JDK8
Please add following variables to .bashrc environment file,
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_ROOT/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_ROOT/lib
export HADOOP_ROOT=""/home/hdadmin/hadoop-2.6.0""
export PATH=$PATH:$HADOOP_ROOT/bin
export PATH=$PATH:$HADOOP_ROOT/sbin
export HADOOP_MAPRED_HOME=${HADOOP_ROOT}
export HADOOP_COMMON_HOME=${HADOOP_ROOT}
export HADOOP_HDFS_HOME=${HADOOP_ROOT}
export YARN_HOME=${HADOOP_ROOT}
"