Fix checkpointer restartpoint assertion failure
When recovery starts from a backup without a signal file, pg_subtrans
is not started at the beginning of recovery and remains unstarted
throughout recovery. However, previously, a restartpoint run by
the checkpointer during recovery nevertheless tried to truncate
pg_subtrans, triggering the assertion failure:
TRAP: failed Assert("TransactionIdIsValid(initial)")
This commit fixes this by tracking whether pg_subtrans has been
started during recovery, and have the checkpointer check this flag
before truncating pg_subtrans at restartpoints.
Backpatch to all supported versions.
Reported-by: Imran Zaheer <[email protected]>
Author: Imran Zaheer <[email protected]>
Author: Fujii Masao <[email protected]>
Reviewed-by: Michael Paquier <[email protected]>
Discussion:
https://postgr.es/m/CA+UBfamzfEReT0VOGRUW_=_aeccyq-cnklr_t4q+yemjah3...@mail.gmail.com
Backpatch-through: 14
Branch
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REL_14_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/d3c9ccdf1edec4f486a860e279d2ef2e22f5e4f1
Modified Files
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src/backend/access/transam/xlog.c | 42 ++++++++++++++++++++++++++++++++++++---
1 file changed, 39 insertions(+), 3 deletions(-)
