tree b6c3c35f348e31edefe515b9261fe0c08aeeff20
parent b267c44e568f3d08a71eab9fc9634ae94c229369
author Francisco Guerrero <frankgh@apache.org> 1698424691 -0700
committer Yifan Cai <ycai@apache.org> 1698861331 -0700

CASSANDRASC-80: HealthCheckPeriodicTask execute never completes the promise when instances are empty

When the HealthCheckPeriodicTask executes, and the instances are null or empty, the promise never completes.
This prevents subsequent scheduled health checks to take place because the PeriodicTaskExecutor will only
schedule the new task only if no other tasks are active. This makes the HealthCheckPeriodicTask to never
perform health checks when this condition is encountered.

In this commit, we fix the issue by completing the promise when this condition is encountered.

Patch by Francisco Guerrero; Reviewed by Dinesh Joshi, Yifan Cai for CASSANDRASC-80