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Previously, if one background worker registered another background worker and set bgw_notify_pid while for the second background worker, it would not receive notifications from the postmaster unless, at the time the "parent" was registered, BGWORKER_BACKEND_DATABASE_CONNECTION was set. To fix, instead instead of including only those background workers that requested database connections in the postmater's BackendList, include them all. There doesn't seem to be any reason not do this, and indeed it removes a significant amount of duplicated code. The other option is to make PostmasterMarkPIDForWorkerNotify look at BackgroundWorkerList in addition to BackendList, but that adds more code duplication instead of getting rid of it. Patch by me. Review and testing by Ashutosh Bapat. |
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