Cluster Troubleshooting
- Cluster frontend is unresponsive
- Check if the Coordinator/s in question are started up.
- Check if the Agency is up and a leader has been elected. If notensure that all or a majority of Agents are up and running.
- Check if all processes have been started up with the same
JWT_SECRET
. If not ensure that theJWT_SECRET
used acrossthe cluster nodes is identical for every process. - Check if all cluster nodes have been started with SSL eitherdis- or enabled. If not decide what mode of operation you wouldlike to run your cluster in, and consistently stick with for allAgents, Coordinators and DBServers.
- Check if network communication between the cluster nodes is suchthat all processes can directly access their peers. Do notoperate proxies between the cluster nodes.
- Cluster front end announces errors on any number of nodes
- This is an indication that the Agency is running but eitherCoordinators or DBServers are disconnected or shutdown. Establish network connection to or start the accordingnodes.
- Make sure that the nodes in question share the same
JWT_SECRET
and SSL operation mode with the functioning nodes.
Dig deeper into cluster troubleshooting by going through theArangoDB Cluster Administration Course.