Hello, everyone!
This is a case of failure to select the primary node on the config cluster.
Symptom
The Failure to select the primary node in the config cluster alarm (alarm ID: 20971522) exists. The Config Server cluster cannot select the primary node, and the cluster cannot function.
Solution
1. Log in to all the Paxos (config) nodes to check whether the config processes exist. Run the following command:
ps -ef|grep mongod|grep 27015
View the command output, and check whether the process exists.
If yes, go to 2.
If no, go to 3.
2. Run the following command to check whether the network between each node in the config cluster and other nodes is faulty (the IP address is that of another node in the Paxos cluster):
ping ip
3. If the connection cannot be pinged through, contact the network administrator to solve the network problem, and go to 3.
If the problem persists, contact technical support engineers.
This is my solution, how about yours? Go ahead and share it with us!
