Fix instability in subscription regression test.

tglsfdc · tglsfdc · commit ee266774454d · 2017-09-20T11:28:34.000-04:00
005_encoding.pl neglected to wait for the subscriber's initial synchronization to happen. While we have not seen this fail in the buildfarm, it's pretty easy to demonstrate there's an issue by hacking logicalrep_worker_launch() to fail most of the time. Michael Paquier Discussion: https://postgr.es/m/27032.1505749806@sss.pgh.pa.us
diff --git a/src/test/subscription/t/005_encoding.pl b/src/test/subscription/t/005_encoding.pl
@@ -41,6 +41,12 @@ sub wait_for_caught_up
 
 wait_for_caught_up($node_publisher, $appname);
 
+# Wait for initial sync to finish as well
+my $synced_query =
+	"SELECT count(1) = 0 FROM pg_subscription_rel WHERE srsubstate NOT IN ('s', 'r');";
+$node_subscriber->poll_query_until('postgres', $synced_query)
+  or die "Timed out while waiting for subscriber to synchronize data";
+
 $node_publisher->safe_psql('postgres',
 	q{INSERT INTO test1 VALUES (1, E'Mot\xc3\xb6rhead')}); # hand-rolled UTF-8
 
