Hi. I'm a newbie user of Hadoop, in fact I'm trying to install it to start studying it. I'm experiencing some troubles when installing Hadoop version 2.5.3.0 on a vm on Azure having a CentOS 7.3, 4 CPUs, 32 GB RAM by using Ambari version 2.4.2.0, but I get the error attached. Please, can anyone help me solve this issue? I already googled to find out a solution, but unfortunately I couldn't. I've also tried to install Hadoop using Ambari version 2.7.3 (latest version) but nothing changed. Please, let me know if you need further information to help me solve this issue. Thanks