pingqiu 943000ae8e fix: RebuildSourceDecision returns FullBase when CommittedLSN=0 ...

When CommittedLSN=0 (sync_all mode, replica degraded), snapshot-tail
rebuild was chosen because IsRecoverable(checkpoint, 0) is vacuously
true (0 <= HeadLSN always). But snapshot-tail requires a valid committed
endpoint for tail-replay. Without it, ExecuteRebuildPlan calls
TransferSnapshot which RemoteRebuildIO doesn't support → immediate fail.

Fix: if CommittedLSN=0, force RebuildFullBase. This is the correct
source when the primary has data but no replica has confirmed durability.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-09 15:46:00 -07:00

..

replication

fix: RebuildSourceDecision returns FullBase when CommittedLSN=0

2026-04-09 15:46:00 -07:00