[11/14/16 15:55:22:187 CET] 00000b52 cluster       I com.mongodb.diagnostics.logging.SLF4JLogger info Exception in monitor thread while connecting to server localhost:27017
                                 java.lang.IllegalStateException: state should be: elapsed time is positive
	at com.mongodb.assertions.Assertions.isTrue(Assertions.java:70)
	at com.mongodb.event.ServerHeartbeatSucceededEvent.<init>(ServerHeartbeatSucceededEvent.java:47)
	at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.lookupServerDescription(DefaultServerMonitor.java:183)
	at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:123)
	at java.lang.Thread.run(Thread.java:798)

class DefaultServerMonitor implements ServerMonitor {
...
private ServerDescription lookupServerDescription(final InternalConnection connection) {
...
            long start = System.nanoTime();
            try {
                BsonDocument isMasterResult = executeCommand("admin", new BsonDocument("ismaster", new BsonInt32(1)), connection);
                long elapsedTimeNanos = System.nanoTime() - start;
                averageRoundTripTime.addSample(elapsedTimeNanos);

                serverMonitorListener.serverHeartbeatSucceeded(
                        new ServerHeartbeatSucceededEvent(connection.getDescription().getConnectionId(), isMasterResult, elapsedTimeNanos));

    public ServerHeartbeatSucceededEvent(final ConnectionId connectionId, final BsonDocument reply, final long elapsedTimeNanos) {
        this.connectionId = notNull("connectionId", connectionId);
        this.reply = notNull("reply", reply);
        isTrue("elapsed time is positive", elapsedTimeNanos > 0);
        this.elapsedTimeNanos = elapsedTimeNanos;
    }