I found the problem: the device that was filled up has this file /var/lib/ambari-agent/data/structured-out-status.json that differs with the other nodes. I following this steps as root rm -f /var/lib/ambari-agent/data/structured-out-status.json ambari-agent restart And I deleted the PID files in /var/run for applications that aren't responding for restart (like Zookeeper and Ambari Metrics Collector). After that Ambari shows the process down. So I started them and now it works correctly. ... View more