Cluster Lock

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?

2 answers

2 accepted

0 vote

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.

Thanks for the reply Aron. I also thought that it will stop and never continues. In such cases, we lose all the capabilities in a clustered architecture right? .. Anyway I will do my testing and post the answer here.

If this is a critical problem in your use case, I'd do this: every job execution should persist (to the database or even to a cluster-wide lock if it doesn't need to be long-living) its start time, its end time or at least some flag at completion.

That way you could periodically check if there was a job that got started, but not finished, and then re-try.

Simple and cluster-safe, because you are using cluster-aware components (database or shared cache).

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

Suggest an answer

Log in or Sign up to answer
How to earn badges on the Atlassian Community

How to earn badges on the Atlassian Community

Badges are a great way to show off community activity, whether you’re a newbie or a Champion.

Learn more
Community showcase
Published Thursday in Jira

5 ways you can make the most of Jira Software and Bitbucket Cloud

As part of the Bitbucket product team I'm always interested in better understanding what kind of impact the use of our tools have on the way you work. In a recent study we conducted of software devel...

73 views 0 5
Read article

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you