Cloudera 安裝失敗時，重裝步驟

service cloudera-scm-server stop
service cloudera-scm-agent stop
yum remove cloudera*
~/rm_hadoop.sh
rpm -ivh cloudera-manager-server cloudera-manager-daemons cloudera-manager-agent
drop database metastore;
drop database scm;
create database metastore character set utf8;
create database scm character set utf8;
/usr/share/cmf/schema/scm_prepare_database.sh mysql scm scm hadoop
netstat -tlunp | grep 7180
netstat -tlunp | grep 7182
netstat -tlunp | grep 9000
netstat -tlunp | grep 9001
service cloudera-scm-server start