Retry DSM control segment creation if Windows indicates access denied.
Otherwise, attempts to run multiple postmasters running on the same
machine may fail, because Windows sometimes returns ERROR_ACCESS_DENIED
rather than ERROR_ALREADY_EXISTS when there is an existing segment.
Hitting this bug is much more likely because of another defect not
fixed by this patch, namely that dsm_postmaster_startup() uses
random() which returns the same value every time. But that's not
a reason not to fix this.
Kyotaro Horiguchi and Amit Kapila, reviewed by Michael Paquier
Discussion: <CAA4eK1JyNdMeF-dgrpHozDecpDfsRZUtpCi+1AbtuEkfG3YooQ@mail.gmail.com>
Branch
------
REL9_5_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/c124e3649b0423cd7abc3f81208d9c7e8a7e8a8a
Modified Files
--------------
src/backend/storage/ipc/dsm_impl.c | 31 ++++++++++++++++++-------------
1 file changed, 18 insertions(+), 13 deletions(-)