I’m using CentOS 6.5 in a AWS AMI and the embedded postgres db.
What I’ve done is installing ambari-log4j package in my AWS AMI. Afterwards I launch a EC2 instance from that AMI and register it within the ambari server. Health checker warned me about ambari-log4j is already installed but eventually this host is added to my cluster with no problem.
If I don’t install ambari-log4j, health checker works with no warning, but ambari server fails to download ambari-log4j package.