From 5ee2197767f648bc21e324e751b84d42af573b43 Mon Sep 17 00:00:00 2001
From: Simon Riggs <simon@2ndQuadrant.com>
Date: Tue, 7 Mar 2017 21:06:09 +0800
Subject: [PATCH] Ensure ThisTimeLineID is valid before START_REPLICATION

Craig Ringer
---
 src/backend/replication/walsender.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c
index 9cf9eb0e4c..dd3a936fc6 100644
--- a/src/backend/replication/walsender.c
+++ b/src/backend/replication/walsender.c
@@ -488,6 +488,11 @@ StartReplication(StartReplicationCmd *cmd)
 	StringInfoData buf;
 	XLogRecPtr	FlushPtr;
 
+	if (ThisTimeLineID == 0)
+		ereport(ERROR,
+				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+				 errmsg("IDENTIFY_SYSTEM has not been run before START_REPLICATION")));
+
 	/*
 	 * We assume here that we're logging enough information in the WAL for
 	 * log-shipping, since this is checked in PostmasterMain().
-- 
2.39.5