Cancel pending async callback before resetting client and evb

presto-native-execution/presto_cpp/main/PeriodicServiceInventoryManager.cpp

@@ -41,8 +41,12 @@ void PeriodicServiceInventoryManager::start() {
 
 void PeriodicServiceInventoryManager::stop() {
   stopped_ = true;
-  client_.reset();
-  eventBaseThread_.stop();
+  // Simply cancel libevent timeout callback before calling reset on the client
+  // first. This is to ensure that the client is not destroyed while there is a
+  // pending request.
+  LOG(INFO) << fmt::format(
+      "Cancelled :{} async events in PeriodicServiceInventoryManager",
+      eventBaseThread_.getEventBase()->timer().cancelAll());
 }
 
 void PeriodicServiceInventoryManager::setDetails(const std::string& details) {