From: | Robert Haas <rhaas(at)postgresql(dot)org> |
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To: | pgsql-committers(at)postgresql(dot)org |
Subject: | pgsql: Tighten up application of parallel mode checks. |
Date: | 2015-10-16 14:22:00 |
Message-ID: | E1Zn5tQ-0000Ge-OR@gemulon.postgresql.org |
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Lists: | pgsql-committers |
Tighten up application of parallel mode checks.
Commit 924bcf4f16d54c55310b28f77686608684734f42 failed to enforce
parallel mode checks during the commit of a parallel worker, because
we exited parallel mode prior to ending the transaction so that we
could pop the active snapshot. Re-establish parallel mode during
parallel worker commit. Without this, it's far too easy for unsafe
actions during the pre-commit sequence to crash the server instead of
hitting the error checks as intended.
Just to be extra paranoid, adjust a couple of the sanity checks in
xact.c to check not only IsInParallelMode() but also
IsParallelWorker().
Branch
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REL9_5_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/d43e3adc7572d34988967475900dcd4f9e0a7b89
Modified Files
--------------
src/backend/access/transam/xact.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
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