[BUG] add row latch when log sync failed

src/observer/ob_server.cpp

@@ -898,6 +898,10 @@ int ObServer::stop()
     FLOG_INFO("mysql shutdown network stopped");
   }
 
+  FLOG_INFO("begin to sql nio stop");
+  net_frame_.sql_nio_stop();
+  FLOG_INFO("sql nio stopped");
+
   FLOG_INFO("begin to stop active session history task");
   ObActiveSessHistTask::get_instance().stop();
   FLOG_INFO("active session history task stopped");

src/observer/ob_srv_network_frame.cpp

@@ -453,9 +453,6 @@ int ObSrvNetworkFrame::stop()
   if (OB_FAIL(net_.stop())) {
     LOG_WARN("stop easy net fail", K(ret));
   } 
-  if (NULL != obmysql::global_sql_nio_server) {
-    obmysql::global_sql_nio_server->stop();
-  }
   return ret;
 }
 
@@ -489,3 +486,10 @@ void ObSrvNetworkFrame::set_ratelimit_enable(int ratelimit_enabled)
   rpc_transport_->set_ratelimit_enable(ratelimit_enabled);
   batch_rpc_transport_->set_ratelimit_enable(ratelimit_enabled);
 }
+
+void ObSrvNetworkFrame::sql_nio_stop()
+{
+  if (NULL != obmysql::global_sql_nio_server) {
+    obmysql::global_sql_nio_server->stop();
+  }
+}

src/observer/ob_srv_network_frame.h

@@ -49,6 +49,7 @@ public:
   int high_prio_rpc_shutdown();
   int batch_rpc_shutdown();
   int unix_rpc_shutdown();
+  void sql_nio_stop();
   void wait();
   int stop();
 

src/storage/memtable/mvcc/ob_mvcc_trans_ctx.cpp

@@ -1204,6 +1204,8 @@ int ObMvccRowCallback::log_sync_fail()
 {
   int ret = OB_SUCCESS;
 
+  ObRowLatchGuard guard(value_.latch_);
+
   if (OB_FAIL(dec_unsynced_cnt_())) {
     TRANS_LOG(ERROR, "memtable dec unsynced cnt error", K(ret),
               K(memtable_->get_unsynced_cnt()));