When creating points to write to influx using Java Instant:

        Instant stamp = Instant.now();
        Point point1 = Point.measurement("cpu")
                .time(stamp.getEpochSecond() * 1000000000 + stamp.getNano(), TimeUnit.NANOSECONDS)
                .addField("idle", 90L)
                .addField("system", 1L)
                .build();

From Java Instant documentation:

The range of an instant requires the storage of a number larger than a long. To achieve this, the class stores a long representing epoch-seconds and an int representing nanosecond-of-second, which will always be between 0 and 999,999,999.

So the previous code may overflow the Long field for time. Maybe time would be better as BigInteger?