Yifan Cai created CASSSIDECAR-181:
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Summary: Ensure memory consistency from PeriodicTask executions
and expose richer ScheduleDecision
Key: CASSSIDECAR-181
URL: https://issues.apache.org/jira/browse/CASSSIDECAR-181
Project: Sidecar for Apache Cassandra
Issue Type: Improvement
Components: Rest API
Reporter: Yifan Cai
Assignee: Yifan Cai
PeriodicTaskExecutor already ensures one active run of each periodic task at
any time. However, the implementation cannot establish the happens-before
ordering between 2 runs. Therefore, writes may not be visible to the next run.
The patch changes the scheduling behavior in the executor to address the issue,
so that the runs are properly ordered, serial as in a single thread.
The patch also addressed a todo left in the code to expose richer
ScheduleDecision enum, instead of using boolean for shouldSkip.
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