If this piece of code is executed:

from influxdb import InfluxDBClusterClient
client = InfluxDBClusterClient(
        [('10.0.0.18',8086)],"x","x","udo")

client.write_points([{"time": "1453118432", "measurement":"medida","fields": {"value": 3}}])

This exception is raised:

influxdb.exceptions.InfluxDBServerError: InfluxDB: no viable server!

The lib is telling us that there is some problem with the servers, but it is not actually the real problem.
The problem is using a string timestamp instead of integer.

The flow is:
https://github.com/influxdata/influxdb-python/blob/master/influxdb/client.py#L276 ->
https://github.com/influxdata/influxdb-python/blob/master/influxdb/line_protocol.py#L131 -> https://github.com/influxdata/influxdb-python/blob/master/influxdb/line_protocol.py#L17 ->
finally calling dateutil.parser.parse("1453120639") that raises:

ValueError: year is out of range

With this PR, that exception is catched and displayed to the user.

I think the error is assuming that all exceptions excluding InfluxDBClientError are server errors: https://github.com/influxdata/influxdb-python/blob/master/influxdb/client.py#L884