@ThierryOfNantes  Welcome to the Cloudera community. I suspect your issue is with your run.as user.  While the nifi.sh may have executable to all, does your run.as user have necessary permissions to traverse the entire directory tree to the nifi.sh script? I suggest trying to navigate the directory tree as the run as user and starting nifii.sh manually as that user.    Can you share your /etc/rc.d/init.d/nifi script? Can you share your /install_directory/nifi/bin/nifi.sh script?   Please help our community grow. If you found any of the suggestions/solutions provided helped you with solving your issue or answering your question, please take a moment to login and click "Accept as Solution" on one or more of them that helped. Thank you, Matt ... View more