PS_warn_no_launcher.txt

text/plain

Filename: PS_warn_no_launcher.txt

Type: text/plain

Part: 0

Message: Re: Warn when creating or enabling a subscription with max_logical_replication_workers = 0

diff --git a/src/backend/replication/logical/launcher.c b/src/backend/replication/logical/launcher.c
index 3ed86480be2..f880380ce4e 100644
--- a/src/backend/replication/logical/launcher.c
+++ b/src/backend/replication/logical/launcher.c
@@ -1195,6 +1195,13 @@ ApplyLauncherWakeup(void)
 {
 	if (LogicalRepCtx->launcher_pid != 0)
 		kill(LogicalRepCtx->launcher_pid, SIGUSR1);
+	else
+	{
+		if (max_logical_replication_workers == 0)
+			ereport(WARNING,
+				errmsg("Logical replication is currently disabled"),
+				errhint("\"%s\" is 0.", "max_logical_replication_workers"));
+	}
 }
 
 /*