CLOSE FOR ME

I have solved this install error. CentOS 6.6 must in english langue, so I changed in all system the LANG="fr_FR.UTF-8" to LANG="en_US.UTF-8"

in the file /etc/sysconfig/i18n.

Also, the system need to be clean then :

/usr/share/cmf/uninstall-cloudera-manager.sh

And create a file cleanSlave.sh
#!/bin/bash

rm -vRf /etc/yum.repos.d/cloudera* /etc/cloudera-*
rm -vRf /usr/share/cmf /var/lib/cloudera* /var/cache/yum/cloudera*
rm -vRf /var/log/cloudera-*
yum remove cloudera*
yum clean all

You can run it on the master and after if you have a lot of machine do something like that :

#!/bin/bash
for n in 1 2 3 4 5
do
  echo slave$n
  ssh root@slave$n 'bash -s' < cleanSlave.sh
done