Hi. thank you for your answer. I found a solution for my problem. If it can help someone, the problem was related to the syntax of my system username. It contains a space. So, to fixe it, you can edit /etc/hadoop/hadoop-env.cmd, at the end of this file, you will find set HADOOP_IDENT_STRING=%USERNAME% , change this with a string that you want but without space. For example: set HADOOP_IDENT_STRING=myuser, the problem will be fixed.