In AutoVacWorkerMain(), the code calls on_shmem_exit(FreeWorkInfo,0) and then kill() to send SIGUSR2 to autovacuum launcher process. In FreeWorkInfo() it sets AutoVacuumShmem->av_signal[AutoVacRebalance] = true. But, is it possible that when autovacuum launcher’s SIGUSR2 handler checks av_signal[AutoVacRebalance], FreeWorkInfo() haven’t set this flag yet and thus autovacuum launcher will miss the AutoVacRebalance event?
