Fix WaitLSNWakeup() fast-path check for InvalidXLogRecPtr WaitLSNWakeup() incorrectly returned early when called with InvalidXLogRecPtr (meaning "wake all waiters"), because the fast-path check compared minWaitedLSN > 0 without validating currentLSN first. This caused WAIT FOR LSN commands to wait indefinitely during standby promotion until random signals woke them.
Add an XLogRecPtrIsValid() check before the comparison so that InvalidXLogRecPtr bypasses the fast-path and wakes all waiters immediately. Discussion: https://postgr.es/m/CABPTF7UieOYbOgH3EnQCasaqcT1T4N6V2wammwrWCohQTnD_Lw%40mail.gmail.com Author: Xuneng Zhou <[email protected]> Reviewed-by: Alexander Korotkov <[email protected]> Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/ede6acef49673df0a880edae405ca69393bb48d0 Modified Files -------------- src/backend/access/transam/xlogwait.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
