364         bool _requestHeartbeat(HeartbeatInfo& mem, BSONObj& info, int& theirConfigVersion) {
365             log() << "_requestHeartbeat - entering function";
366             {
367                 log() << "_requestHeartbeat - initial scoped connection check " << __FILE__ << ":" << __LINE__;
368                 ScopedConn conn(h.toString());
369                 conn.setTimeout(_timeout);
370                 if (tries++ % threshold == (threshold - 1)) {
371                     log() << "_requestHeartbeat - reconnect attempt for scoped connection " << __FILE__ << ":" << __LINE__;
372                     conn.reconnect();
373                     log() << "_requestHeartbeat - after failed reconnect attempt for scoped connection " << __FILE__ << ":" << __LINE__;
374                 }
375             }
376 
377             Timer timer;
378             time_t before = curTimeMicros64() / 1000000;
379 
380             bool ok = tryHeartbeat(&info, &theirConfigVersion);
381 
382             mem.ping = static_cast<unsigned int>(timer.millis());
383             time_t totalSecs = mem.ping / 1000;
384 
385             // if that didn't work and we have more time, lower timeout and try again
386             if (!ok && totalSecs < _timeout) {
387                 log() << "replset info " << h.toString() << " heartbeat failed, retrying" << rsLog;
388 
389                 // lower timeout to remaining ping time
390                 {
391                     log() << "_requestHeartbeat - getting scoped connection again for setting timeout " << __FILE__ << ":" << __LINE__;
392                     ScopedConn conn(h.toString());
393                     conn.setTimeout(_timeout - totalSecs);
394                 }
395 
396                 int checkpoint = timer.millis();
397                 timer.reset();
398                 ok = tryHeartbeat(&info, &theirConfigVersion);
399                 mem.ping = static_cast<unsigned int>(timer.millis());
400                 totalSecs = (checkpoint + mem.ping)/1000;
401 
402                 // set timeout back to default
403                 {
404                     log() << "_requestHeartbeat - getting scoped connection again for resetting timeout " << __FILE__ << ":" << __LINE__;
405                     ScopedConn conn(h.toString());
406                     conn.setTimeout(_timeout);
407                 }
408             }
409 
410             // we set this on any response - we don't get this far if
411             // couldn't connect because exception is thrown
412             time_t after = mem.lastHeartbeat = before + totalSecs;
413 
414             if ( info["time"].isNumber() ) {
415                 long long t = info["time"].numberLong();
416                 if( t > after )
417                     mem.skew = (int) (t - after);
418                 else if( t < before )
419                     mem.skew = (int) (t - before); // negative
420             }
421             else {
422                 // it won't be there if remote hasn't initialized yet
423                 if( info.hasElement("time") )
424                     warning() << "heatbeat.time isn't a number: " << info << endl;
425                 mem.skew = INT_MIN;
426             }
427 
428             {
429                 be state = info["state"];
430                 if( state.ok() )
431                     mem.hbstate = MemberState(state.Int());
432             }
433 
434             if (info.hasField("stateDisagreement") && info["stateDisagreement"].trueValue()) {
435                 log() << "replset info " << h.toString() << " thinks that we are down" << endl;
436             }
437 
438             log() << "_requestHeartbeat - leaving function";
439             return ok;
440         }