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Michael Paquier 1346794feb Fix rare instability in recovery TAP test 004_timeline_switch ... This fixes a problem similar to ad8c86d22c. In this case, the test could fail under the following circumstances: - The primary is stopped with teardown_node(), meaning that it may not be able to send all its WAL records to standby_1 and standby_2. - If standby_2 receives more records than standby_1, attempting to reconnect standby_2 to the promoted standby_1 would fail because of a timeline fork. This race condition is fixed with a simple trick: instead of tearing down the primary, it is stopped cleanly so as all the WAL records of the primary are received and flushed by both standby_1 and standby_2. Once we do that, there is no need for a wait_for_catchup() before stopping the node. The test wants to check that a timeline jump can be achieved when reconnecting a standby to a promoted standby in the same cluster, hence an immediate stop of the primary is not required. This failure is harder to reach than the previous instability of 009_twophase, still the buildfarm has been able to detect this failure at least once. I have tried Alexander Lakhin's test trick with the bgwriter and very aggressive standby snapshots, but I could not reproduce it directly. It is reachable, as the buildfarm has proved. Backpatch down to all supported branches, and this problem can lead to spurious failures in the buildfarm. Discussion: https://postgr.es/m/493401a8-063f-436a-8287-a235d9e065fc@gmail.com Backpatch-through: 14		3 months ago
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backend	Don't malloc(0) in EventTriggerCollectAlterTSConfig	3 months ago
bin	Fix some cases of indirectly casting away const.	3 months ago
common	Fix mb2wchar functions on short input.	4 months ago
fe_utils	In fmtIdEnc(), handle failure of enlargePQExpBuffer().	1 year ago
include	Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code.	3 months ago
interfaces	Fix some cases of indirectly casting away const.	3 months ago
makefiles	…
pl	EUC_CN, EUC_JP, EUC_KR, EUC_TW: Skip U+00A0 tests instead of failing.	3 months ago
port	Fix some cases of indirectly casting away const.	3 months ago
template	…
test	Fix rare instability in recovery TAP test 004_timeline_switch	3 months ago
timezone	Fix some cases of indirectly casting away const.	3 months ago
tools	Fix Solution.pm for change in pg_config.h contents.	3 months ago
tutorial	…
.gitignore	…
DEVELOPERS	…
Makefile	…
Makefile.global.in	Don't put library-supplied -L/-I switches before user-supplied ones.	10 months ago
Makefile.shlib	…
nls-global.mk	Fix update-po for the PGXS case	8 months ago