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4fd916eab9
Previously, if primary_slot_name was set to an invalid slot name and the configuration file was reloaded, both the postmaster and all other backend processes reported a WARNING. With many processes running, this could produce a flood of duplicate messages. The problem was that the GUC check hook for primary_slot_name reported errors at WARNING level via ereport(). This commit changes the check hook to use GUC_check_errdetail() and GUC_check_errhint() for error reporting. As with other GUC parameters, this causes non-postmaster processes to log the message at DEBUG3, so by default, only the postmaster's message appears in the log file. Backpatch to all supported versions. Author: Fujii Masao <masao.fujii@gmail.com> Reviewed-by: Chao Li <lic@highgo.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com> Discussion: https://postgr.es/m/CAHGQGwFud-cvthCTfusBfKHBS6Jj6kdAPTdLWKvP2qjUX6L_wA@mail.gmail.com Backpatch-through: 13