Denis Protivensky
4e2c02a12c
MDEV-33133: MDL conflict handling code should skip BF-aborted trxs
...
It's possible that MDL conflict handling code is called more
than once for a transaction when:
- it holds more than one conflicting MDL lock
- reschedule_waiters() is executed,
which results in repeated attempts to BF-abort already aborted
transaction.
In such situations, it might be that BF-aborting logic sees
a partially rolled back transaction and erroneously decides
on future actions for such a transaction.
The specific situation tested and fixed is when a SR transaction
applied in the node gets BF-aborted by a started TOI operation.
It's then caught with the server transaction already rolled back,
but with no MDL locks yet released. This caused wrong state
detection for such a transaction during repeated MDL conflict
handling code execution.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com >
2024-09-03 07:45:57 +02:00
..
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