Phoenix 7920 Add replay-side handling for direct DEGRADED_STANDBY → STANDBY_TO_ACTIVE transition (ANISTS → AISTS)#2573
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July 11, 2026 16:27
… on direct failover
… (avoid epoch rewind)
Capture current time at the start of initializeLastRoundProcessed() (before the HA group state read and file scans) and thread it through all three init branches - DEGRADED_STANDBY, STANDBY_TO_ACTIVE, and the SYNC path - via a new fallback-time overload on the parent. This anchors the starting round to when init began, so a SYNC -> DEGRADED_STANDBY transition during init cannot push the round (and the SYNC-path recovery floor) past the degradation point. Also documents the zero lastSyncStateTimeInMs fallback on initLastRoundsFromLastSyncPoint.
…on test The zero-lastSyncStateTimeInMs guard in initLastRoundsFromLastSyncPoint is shared by the DEGRADED_STANDBY and STANDBY_TO_ACTIVE init paths, but only the STANDBY_TO_ACTIVE path had a zero-sync regression test. The guard also corrected the DEGRADED path (which previously computed round(min(0, frontier)) = round(0) = ReplicationRound(0,0), the epoch-rewind bug). This adds the symmetric DEGRADED_STANDBY test so a future refactor that diverges the two paths cannot silently reintroduce the epoch rewind. Test count 44 -> 45 (failsafe XML verified GREEN).
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