Fix timeout handling in logical replication worker

michaelpq · michaelpq · commit 47698b4b62e3 · 2019-10-18T14:27:04.000+09:00
The timestamp tracking the last moment a message is received in a logical replication worker was initialized in each loop checking if a message was received or not, causing wal_receiver_timeout to be ignored in basically any logical replication deployments. This also broke the ping sent to the server when reaching half of wal_receiver_timeout. This simply moves the initialization of the timestamp out of the apply loop to the beginning of LogicalRepApplyLoop(). Reported-by: Jehan-Guillaume De Rorthais Author: Julien Rouhaud Discussion: https://postgr.es/m/CAOBaU_ZHESFcWva8jLjtZdCLspMj7vqaB2k++rjHLY897ZxbYw@mail.gmail.com Backpatch-through: 10
diff --git a/src/backend/replication/logical/worker.c b/src/backend/replication/logical/worker.c
@@ -1035,6 +1035,8 @@ UpdateWorkerStats(XLogRecPtr last_lsn, TimestampTz send_time, bool reply)
 static void
 LogicalRepApplyLoop(XLogRecPtr last_received)
 {
+	TimestampTz last_recv_timestamp = GetCurrentTimestamp();
+
 	/*
 	 * Init the ApplyMessageContext which we clean up after each replication
 	 * protocol message.
@@ -1053,7 +1055,6 @@ LogicalRepApplyLoop(XLogRecPtr last_received)
 		int			len;
 		char	   *buf = NULL;
 		bool		endofstream = false;
-		TimestampTz last_recv_timestamp = GetCurrentTimestamp();
 		bool		ping_sent = false;
 		long		wait_time;
 
