From dc82f5a6406dfef21ae1668b1c69a32c8a68c670 Mon Sep 17 00:00:00 2001
From: Fujii Masao <fujii@postgresql.org>
Date: Tue, 24 Jan 2017 12:41:09 +0900
Subject: [PATCH] Be sure to release the lock on failure to launch logical
 replication worker.

Petr Jelinek
---
 src/backend/replication/logical/launcher.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/backend/replication/logical/launcher.c b/src/backend/replication/logical/launcher.c
index 18919724af..b511670357 100644
--- a/src/backend/replication/logical/launcher.c
+++ b/src/backend/replication/logical/launcher.c
@@ -261,6 +261,7 @@ logicalrep_worker_launch(Oid dbid, Oid subid, const char *subname, Oid userid)
 	/* Bail if not found */
 	if (worker == NULL)
 	{
+		LWLockRelease(LogicalRepWorkerLock);
 		ereport(WARNING,
 				(errcode(ERRCODE_CONFIGURATION_LIMIT_EXCEEDED),
 				 errmsg("out of logical replication workers slots"),