From: sergepetrenko <sergepetrenko@tarantool.org> To: alexander.turenko@tarantool.org, v.shpilevoy@tarantool.org, kostja.osipov@gmail.com Cc: tarantool-patches@dev.tarantool.org Subject: [Tarantool-patches] [PATCH v2 3/4] wal: wart when trying to write a record with a broken lsn Date: Fri, 14 Feb 2020 00:52:59 +0300 [thread overview] Message-ID: <97f37279955ebc29e899164cc1364e6a0aea0f9b.1581630406.git.sergepetrenko@tarantool.org> (raw) In-Reply-To: <cover.1581630406.git.sergepetrenko@tarantool.org> From: Serge Petrenko <sergepetrenko@tarantool.org> There is an assertion in vclock_follow `lsn > prev_lsn`, which doesn't fire in release builds, of course. Let's at least warn the user on an attemt to write a record with a duplicate or otherwise broken lsn. Follow-up #4739 --- src/box/wal.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/src/box/wal.c b/src/box/wal.c index 0ae66ff32..f8ee2b7d8 100644 --- a/src/box/wal.c +++ b/src/box/wal.c @@ -951,9 +951,18 @@ wal_assign_lsn(struct vclock *vclock_diff, struct vclock *base, (*row)->tsn = tsn; (*row)->is_commit = row == end - 1; } else { - vclock_follow(vclock_diff, (*row)->replica_id, - (*row)->lsn - vclock_get(base, - (*row)->replica_id)); + int64_t diff = (*row)->lsn - vclock_get(base, (*row)->replica_id); + if (diff <= vclock_get(vclock_diff, + (*row)->replica_id)) { + say_crit("Attempt to write a broken LSN to WAL:" + " replica id: %d, committed lsn: %d," + " new lsn %d", (*row)->replica_id, + vclock_get(base, (*row)->replica_id) + + vclock_get(vclock_diff, + (*row)->replica_id), + (*row)->lsn); + } + vclock_follow(vclock_diff, (*row)->replica_id, diff); } } } -- 2.20.1 (Apple Git-117)
next prev parent reply other threads:[~2020-02-13 21:53 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-02-13 21:52 [Tarantool-patches] [PATCH v2 0/4] replication: fix applying of rows originating from local instance sergepetrenko 2020-02-13 21:52 ` [Tarantool-patches] [PATCH v2 1/4] box: expose box_is_orphan method sergepetrenko 2020-02-13 21:52 ` [Tarantool-patches] [PATCH v2 2/4] replication: check for rows to skip in applier correctly sergepetrenko 2020-02-14 7:19 ` Konstantin Osipov 2020-02-14 7:29 ` Konstantin Osipov 2020-02-13 21:52 ` sergepetrenko [this message] 2020-02-14 7:20 ` [Tarantool-patches] [PATCH v2 3/4] wal: wart when trying to write a record with a broken lsn Konstantin Osipov 2020-02-14 10:46 ` Serge Petrenko 2020-02-16 16:15 ` Vladislav Shpilevoy 2020-02-18 17:28 ` Serge Petrenko 2020-02-18 21:15 ` Vladislav Shpilevoy 2020-02-19 8:46 ` Serge Petrenko 2020-02-13 21:53 ` [Tarantool-patches] [PATCH v2 4/4] replication: do not promote local_vclock_at_subscribe unnecessarily sergepetrenko 2020-02-14 7:25 ` Konstantin Osipov 2020-02-14 10:46 ` Serge Petrenko 2020-02-14 10:52 ` Konstantin Osipov
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