Make TimeoutsHolder.start idempotent - #2319
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Motivation:
TimeoutsHolder#start()is public and nothing stops it running twice. A second call overwrites the first scheduler handle, leaving an entry nobody can cancel.Modification:
Guard
start()with a started AtomicBoolean CAS so only the first call arms, and say so in its Javadoc.Result:
A repeated
start()is a no-op instead of orphaning a scheduled entry.