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MDEV-25611: RESET MASTER causes the server to hang #3528

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Sep 27, 2024
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MDEV-25611: RESET MASTER causes the server to hang

RESET MASTER waits for storage engines to reply to a binlog checkpoint
requests. If this response is delayed for a long time for some reason, then
RESET MASTER can hang.

Fix this by forcing a log sync in all engines just before waiting for the
checkpoint reply.

(Waiting for old checkpoint responses is needed to preserve durability of
any commits that were synced to disk in the to-be-deleted binlog but not yet
synced in the engine.)

@MariaDB MariaDB deleted a comment from CLAassistant Sep 19, 2024
@knielsen knielsen requested a review from dr-m September 19, 2024 06:54
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Looks good. Thanks!

RESET MASTER waits for storage engines to reply to a binlog checkpoint
requests. If this response is delayed for a long time for some reason, then
RESET MASTER can hang.

Fix this by forcing a log sync in all engines just before waiting for the
checkpoint reply.

(Waiting for old checkpoint responses is needed to preserve durability of
any commits that were synced to disk in the to-be-deleted binlog but not yet
synced in the engine.)

Reviewed-by: Andrei Elkin <andrei.elkin@mariadb.com>
Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
@MariaDB MariaDB deleted a comment from CLAassistant Sep 27, 2024
@knielsen knielsen merged commit 35c732c into 11.4 Sep 27, 2024
11 of 16 checks passed
@grooverdan grooverdan deleted the knielsen_mdev25611 branch October 2, 2024 06:59
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2 participants