One of the popular existing job scheduler is Quartz, it is solid and does work pretty well up to a limit. The problem arises where we need to scale-out from a s

One of the popular existing job scheduler is Quartz, it is solid and does work pretty well up to a limit. The problem arises where we need to scale-out from a single master DB, there are some workarounds for that, but each has its limitations. (https://hazelcast.com/blog/distributed-task-coordination-with-hazelcast/ https://hazelcast.com/blog/distributed-task-coordination-wit...) While there are some existing solutions like BigBen from Walmart, it might be possible that they were overkill for the task required.