From 069e59db0394de9d059e15b338e34fd8823f0326 Mon Sep 17 00:00:00 2001
From: bert hubert <bert.hubert@netherlabs.nl>
Date: Fri, 26 Feb 2016 18:12:21 +0100
Subject: [PATCH] in dnsdist maintenance thread we'd lock up trying to lock
 g_luamutex twice

---
 pdns/dnsdist.cc | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/pdns/dnsdist.cc b/pdns/dnsdist.cc
index a793a15d92..b0447bb9cd 100644
--- a/pdns/dnsdist.cc
+++ b/pdns/dnsdist.cc
@@ -1012,10 +1012,12 @@ void* maintThread()
   for(;;) {
     sleep(interval);
 
-    std::lock_guard<std::mutex> lock(g_luamutex);
-    auto f =g_lua.readVariable<boost::optional<std::function<void()> > >("maintenance");
-    if(f)
-      (*f)();
+    {
+      std::lock_guard<std::mutex> lock(g_luamutex);
+      auto f =g_lua.readVariable<boost::optional<std::function<void()> > >("maintenance");
+      if(f)
+        (*f)();
+    }
 
     counter++;
     if (counter >= g_cacheCleaningDelay) {
-- 
2.47.2