From a0503c6e93b3bac1a5c0ac49ad636185cfb53e86 Mon Sep 17 00:00:00 2001
From: cooli <y.p.zhang8664@gmail.com>
Date: Thu, 15 Sep 2022 22:14:22 +0800
Subject: [PATCH] fix: deadlock caused by rwMutex in limiter mapper

---
 filter/adaptivesvc/limiter_mapper.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/filter/adaptivesvc/limiter_mapper.go b/filter/adaptivesvc/limiter_mapper.go
index f4c2aac6aa..e9343ed6e1 100644
--- a/filter/adaptivesvc/limiter_mapper.go
+++ b/filter/adaptivesvc/limiter_mapper.go
@@ -58,6 +58,8 @@ func (m *limiterMapper) newAndSetMethodLimiter(url *common.URL, methodName strin
 		ok bool
 	)
 	m.rwMutex.Lock()
+	defer m.rwMutex.Unlock()
+
 	if l, ok = limiterMapperSingleton.mapper[key]; ok {
 		return l, nil
 	}
@@ -68,7 +70,6 @@ func (m *limiterMapper) newAndSetMethodLimiter(url *common.URL, methodName strin
 		return nil, ErrLimiterTypeNotFound
 	}
 	limiterMapperSingleton.mapper[key] = l
-	m.rwMutex.Unlock()
 	return l, nil
 }