use more rational node timeout, 60s.

lichao

2021-05-18 ccf72bb0b8aa9c421bb2964acca2dcd868d10a94

 src/topic_node.h

@@ -86,7 +86,11 @@
   {
      class Impl
      {
         typedef std::unordered_map<Topic, Address> Records;
         struct TimedRec {
            Address addr_;
            int64_t timestamp_;
         };
         typedef std::unordered_map<Topic, TimedRec> Records;
         Records records_;

      public:
@@ -94,15 +98,18 @@
         {
            auto pos = records_.find(topic);
            if (pos != records_.end()) {
               addr = pos->second;
               return true;
            } else {
               return false;
               if (NowSec() - pos->second.timestamp_ < NodeTimeoutSec() / 2) {
                  addr = pos->second.addr_;
                  return true;
               } else {
                  LOG_TRACE() << "topic dest cache timeout.";
               }
            }
            return false;
         }
         bool Store(const Topic &topic, const Address &addr)
         {
            records_[topic] = addr;
            records_[topic] = {addr, NowSec()};
            return true;
         }
      };