Cluster Lock

Question

I have modified my plugin to support Jira Data Center.

I use cluster lock to restrict one of my processes to run only in a single node at a time.

Question: In a cluster, we know that if one node is down then the process is transferred to another node. But when we use cluster locks we restrict one process into one node. In such cases, if that particular node is down, then is the load balancer switch the process to other node?

Aron Gombas _Midori_ · Accepted Answer

I'd think that if the lock was acquired by node "A" and "A" goes down, the lock simply gets released (either by timing out or the cluster orchestration mechanism recognizes that "A" is not available anymore). The process will not be moved to some other node, at least I don't think so.

Instead, this is your responsibility to start the process again either manually or via the CRON scheduler.

Sa Kan · Accepted Answer

Yeah.. Got it. So, the Cluster Lock works only in a single host. SO, if that breaks, the process will stop. Thanks Aron.