Question #207179 on Graphite changed:
https://answers.launchpad.net/graphite/+question/207179
Status: Open => Answered
Jeff Blaine proposed the following answer:
> I have a script that parse http logs, summarize/aggregate the data and send
> to carbon.
>
> That scripts send information like number of requests per status code (200,
> 301, 302, 404, 503), per method (POST, GET, HEAD, etc) and I created graphics
> that show percentage of each kind of request and error code to follow the
> numbers.
>
> Everything works great until I face with a situation where in a certain
> period of time there isn't any request with a specific status code so there
> is no data in the whisper database, when this happens my existent graphs are
> not displayed anymore and the graphite-web display the error "reduce() of
> empty sequence with no initial value".
>
> Is there any way to make graphite interpret "no data" as 0 ? Or do I need
> to change my script to send zero value when there isn´t data in that period ?
http://graphite.readthedocs.org/en/0.9.10/render_api.html#drawnullaszero
?
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