A host has no monitoring data. What should I do?

Cause

Port 9092, used for monitoring communication between the Management Node and the affected host, is not open.

Solution

1. Log in to the affected host and run the following command to check whether port 9092 is being listened on:

   [root@localhost ~]# netstat -tunlp | grep 9092

2. Log in to the Management Node and run the following command to verify connectivity to port 9092 on the affected host, then open port 9092 if it is blocked:

   [root@localhost ~]# curl -v IP:9092