From d5a64253ec86e8b297bec6c57f9fbd3ddcfe008e Mon Sep 17 00:00:00 2001
From: Jan Christoph Uhde <Jan@UhdeJC.com>
Date: Wed, 6 Jul 2016 17:01:43 +0200
Subject: [PATCH] fix: add missing mutex

---
 arangod/V8Server/V8PeriodicTask.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arangod/V8Server/V8PeriodicTask.cpp b/arangod/V8Server/V8PeriodicTask.cpp
index ab304db256..f5cbe01187 100644
--- a/arangod/V8Server/V8PeriodicTask.cpp
+++ b/arangod/V8Server/V8PeriodicTask.cpp
@@ -41,6 +41,7 @@ Mutex V8PeriodicTask::RUNNING_LOCK;
 
 void V8PeriodicTask::jobDone(Task* task) {
   try {
+    MUTEX_LOCKER(guard, V8PeriodicTask::RUNNING_LOCK);
     RUNNING.erase(task);
   } catch (...) {
     // ignore any memory error
@@ -48,7 +49,7 @@ void V8PeriodicTask::jobDone(Task* task) {
 }
 
 V8PeriodicTask::V8PeriodicTask(std::string const& id, std::string const& name,
-                               TRI_vocbase_t* vocbase, 
+                               TRI_vocbase_t* vocbase,
                                double offset, double period,
                                std::string const& command,
                                std::shared_ptr<VPackBuilder> parameters,
@@ -87,7 +88,7 @@ bool V8PeriodicTask::handlePeriod() {
     LOG(WARN) << "could not add task " << _command << ", no dispatcher known";
     return false;
   }
-  
+
   {
     MUTEX_LOCKER(guard, V8PeriodicTask::RUNNING_LOCK);
 
@@ -102,7 +103,7 @@ bool V8PeriodicTask::handlePeriod() {
   std::unique_ptr<Job> job(new V8Job(
       _vocbase, "(function (params) { " + _command + " } )(params);",
       _parameters, _allowUseDatabase, this));
-  
+
   DispatcherFeature::DISPATCHER->addJob(job, false);
 
   return true;