Skip WAL recycling and preallocation during archive recovery. The previous commit addressed the chief consequences of a race condition between InstallXLogFileSegment() and KeepFileRestoredFromArchive(). Fix three lesser consequences. A spurious durable_rename_excl() LOG message remained possible. KeepFileRestoredFromArchive() wasted the proceeds of WAL recycling and preallocation. Finally, XLogFileInitInternal() could return a descriptor for a file that KeepFileRestoredFromArchive() had already unlinked. That felt like a recipe for future bugs.
This commit has been applied as of cc2c7d65fc27 in v15 and newer versions. This is required on stable branches of v13 and v14 to fix a regression reported by Noah Misch, introduced by 1f95181b44c8, causing spurious failures in archive recovery (neither streaming nor archive recovery) with concurrent restartpoints. The backpatched versions of the patches have been aligned on these branches by me, Noah Misch is the author. Tests have been conducted by the both of us. Note that this commit is known to have introduced a regression of its own. This is fixed by the commit following this one, and not grouped in a single commit to keep the commit history consistent across all branches. Reported-by: Arun Thirupathi Author: Noah Misch <n...@leadboat.com> Discussion: https://postgr.es/m/20210202151416.gb3304...@rfd.leadboat.com Discussion: https://postgr.es/m/20250306193013.36.nmi...@google.com Backpatch-through: 13 Branch ------ REL_13_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/a5b0c06daae96260dc418278acddd0496214892b Author: Noah Misch <n...@leadboat.com> Modified Files -------------- src/backend/access/transam/xlog.c | 65 ++++++++++++++++++++++++++++++++++----- 1 file changed, 57 insertions(+), 8 deletions(-)
