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This patch replaces use of the global "wrconn" variable in AlterSubscription_refresh with a local variable of the same name, making it consistent with other functions in subscriptioncmds.c (e.g. DropSubscription). The global wrconn is only meant to be used for logical apply/tablesync worker. Abusing it this way is known to cause trouble if an apply worker manages to do a subscription refresh, such as reported by Jeremy Finzel and diagnosed by Andres Freund back in November 2020, at https://www.postgresql.org/message-id/20201111215820.qihhrz7fayu6myfi@alap3.anarazel.de Backpatch to 10. In branch master, also move the connection establishment to occur outside the PG_TRY block; this way we can remove a test for NULL in PG_FINALLY, and it also makes the code more consistent with similar code in the same file. Author: Peter Smith <peter.b.smith@fujitsu.com> Reviewed-by: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com> Reviewed-by: Japin Li <japinli@hotmail.com> Discussion: https://postgr.es/m/CAHut+Pu7Jv9L2BOEx_Z0UtJxfDevQSAUW2mJqWU+CtmDrEZVAg@mail.gmail.com |
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