Don't repeatedly register cache callbacks in pgoutput plugin. Multiple cycles of starting up and shutting down the plugin within a single session would eventually lead to "out of relcache_callback_list slots", because pgoutput_startup blindly re-registered its cache callbacks each time. Fix it to register them only once, as all other users of cache callbacks already take care to do.
This has been broken all along, so back-patch to all supported branches. Shi Yu Discussion: https://postgr.es/m/oszpr01mb631004a78d743d68921ffad3fd...@oszpr01mb6310.jpnprd01.prod.outlook.com Branch ------ REL_13_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/861e9e48601b41ab3827ba5d22990c17ed6dcf8c Modified Files -------------- src/backend/replication/pgoutput/pgoutput.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-)
