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2 Commits

Author SHA1 Message Date
Kristian Nielsen
7c9837ce74 Merge 10.4 into 10.5
Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
2023-08-15 18:02:18 +02:00
Kristian Nielsen
920789e9d4 MDEV-31482: Lock wait timeout with INSERT-SELECT, autoinc, and statement-based replication
Remove the exception that InnoDB does not report auto-increment locks waits
to the parallel replication.

There was an assumption that these waits could not cause conflicts with
in-order parallel replication and thus need not be reported. However, this
assumption is wrong and it is possible to get conflicts that lead to hangs
for the duration of --innodb-lock-wait-timeout. This can be seen with three
transactions:

1. T1 is waiting for T3 on an autoinc lock
2. T2 is waiting for T1 to commit
3. T3 is waiting on a normal row lock held by T2

Here, T3 needs to be deadlock killed on the wait by T1.

Note: This should be null-merged to 10.6, as a different fix is needed
there due to InnoDB lock code changes.

Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
2023-08-15 16:34:09 +02:00