fix_smart_shutdown_in_recovery_v5_fujii.patch

*** a/src/backend/postmaster/postmaster.c
--- b/src/backend/postmaster/postmaster.c
***************
*** 287,292 **** typedef enum
--- 287,294 ----
  
  static PMState pmState = PM_INIT;
  
+ static bool ReachedEndOfRecovery = false;	/* T if we've reached PM_RUN */
+ 
  bool		ClientAuthInProgress = false;		/* T during new-client
  												 * authentication */
  
***************
*** 2168,2174 **** pmdie(SIGNAL_ARGS)
  					(errmsg("received smart shutdown request")));
  
  			if (pmState == PM_RUN || pmState == PM_RECOVERY ||
! 				pmState == PM_HOT_STANDBY)
  			{
  				/* autovacuum workers are told to shut down immediately */
  				SignalAutovacWorkers(SIGTERM);
--- 2170,2176 ----
  					(errmsg("received smart shutdown request")));
  
  			if (pmState == PM_RUN || pmState == PM_RECOVERY ||
! 				pmState == PM_HOT_STANDBY || pmState == PM_STARTUP)
  			{
  				/* autovacuum workers are told to shut down immediately */
  				SignalAutovacWorkers(SIGTERM);
***************
*** 2370,2375 **** reaper(SIGNAL_ARGS)
--- 2372,2378 ----
  			 * Startup succeeded, commence normal operations
  			 */
  			FatalError = false;
+ 			ReachedEndOfRecovery = true;
  			pmState = PM_RUN;
  
  			/*
***************
*** 3028,3036 **** PostmasterStateMachine(void)
  		{
  			/*
  			 * Terminate backup mode to avoid recovery after a clean fast
! 			 * shutdown.
  			 */
! 			CancelBackup();
  
  			/* Normal exit from the postmaster is here */
  			ExitPostmaster(0);
--- 3031,3042 ----
  		{
  			/*
  			 * Terminate backup mode to avoid recovery after a clean fast
! 			 * shutdown. We skip this cancellation if we've not reached
! 			 * end of recovery yet since the backup label file is still
! 			 * required for subsequent recovery.
  			 */
! 			if (ReachedEndOfRecovery)
! 				CancelBackup();
  
  			/* Normal exit from the postmaster is here */
  			ExitPostmaster(0);
***************
*** 3058,3063 **** PostmasterStateMachine(void)
--- 3064,3072 ----
  		shmem_exit(1);
  		reset_shared(PostPortNumber);
  
+ 		/* Reset to false before restarting recovery */
+ 		ReachedEndOfRecovery = false;
+ 
  		StartupPID = StartupDataBase();
  		Assert(StartupPID != 0);
  		pmState = PM_STARTUP;
***************
*** 4208,4214 **** sigusr1_handler(SIGNAL_ARGS)
  	}
  
  	if (CheckPostmasterSignal(PMSIGNAL_START_WALRECEIVER) &&
! 		WalReceiverPID == 0)
  	{
  		/* Startup Process wants us to start the walreceiver process. */
  		WalReceiverPID = StartWalReceiver();
--- 4217,4225 ----
  	}
  
  	if (CheckPostmasterSignal(PMSIGNAL_START_WALRECEIVER) &&
! 		WalReceiverPID == 0 &&
! 		(pmState == PM_STARTUP || pmState == PM_RECOVERY ||
! 		 pmState == PM_HOT_STANDBY || pmState == PM_WAIT_READONLY))
  	{
  		/* Startup Process wants us to start the walreceiver process. */
  		WalReceiverPID = StartWalReceiver();