Phoenix-7920 Add replay-side handling for direct DEGRADED_STANDBY → STANDBY_TO_ACTIVE transition (ANISTS → AISTS)#2577
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July 16, 2026 17:01
…IVE transition (ANISTS → AISTS)
…NC when nothing to rewind On a restart while already STANDBY_TO_ACTIVE (e.g. an RS bounce after a direct DEGRADED_STANDBY -> STANDBY_TO_ACTIVE), enter SYNCED_RECOVERY only when a rewind is actually pending (lastRoundInSync behind lastRoundProcessed). When the rounds are equal there is nothing to rewind, so initialize directly to SYNC and let the first replay() promote immediately, instead of waiting ~one round window for the SYNCED_RECOVERY -> SYNC CAS that only fires inside the round-processing loop. Arm failoverPending with a plain set and emit distinct restart-init log lines for the two sub-cases. Add regression guard testReplay_RestartIntoStandbyToActive_NothingToReplay_PromotesOnFirstTick (promotes on the first replay tick) and update the existing STANDBY_TO_ACTIVE init tests for the SYNC outcome. In StoreAndForwardFailoverIT, gate transitionCluster2's peer-reaction settle-poll to the DEGRADED_STANDBY target (with named constants) and note that PHOENIX_REPLICATION_REPLAY_ENABLED also gates the compaction consistency-point guard. Document degradedListener's authoritative (non-CAS) set and the init-time compareAndSet(NOT_INITIALIZED, ...) yield-to-listener semantics.
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JIRA : https://issues.apache.org/jira/browse/PHOENIX-7920