# NaN value for statistics

**URL:** <https://community.graylog.org/t/nan-value-for-statistics/14134>\
**Category:** Graylog Central (peer support)\
**Created:** [February 24, 2020, 12:43pm UTC](https://community.graylog.org/t/nan-value-for-statistics/14134 "2020-02-24T12:43:35Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![romgo](https://avatars.discourse-cdn.com/v4/letter/r/ecc23a/32.png) [@romgo](https://community.graylog.org/u/romgo)\
**Post date:** [February 24, 2020, 12:43pm UTC](https://community.graylog.org/t/nan-value-for-statistics/14134/1 "2020-02-24T12:43:35Z")

</div>

Hi,

I have a grok pattern for apache logs as follow :

`%{IPORHOST:xforwardedfor} %{COMMONAPACHELOG} %{QS:referrer} %{QS:agent} %{NUMBER:response_time;float}`

I want to graph the average response\_time field, but for now I just get NaN in statistic table.

I don’t understand why, because I followed documentation : [https://docs.graylog.org/en/3.1/pages/extractors.html#using-grok-patterns-to-extract-data](https://docs.graylog.org/en/3.1/pages/extractors.html#using-grok-patterns-to-extract-data) and [Convert fields created by grok pattern as integer](https://community.graylog.org/t/convert-fields-created-by-grok-pattern-as-integer/14046)

Moreover on Elasticsearch side I see the field as :

```
      "response_time" : {
        "type" : "long"
      },

```

I rotate the indice but so far no luck. How can I troubleshoot this ?

By the way I’m running graylog server 3.0.2-1

Best regards,

---

<div class="post-metadata">

**Author:** ![romgo](https://avatars.discourse-cdn.com/v4/letter/r/ecc23a/32.png) [@romgo](https://community.graylog.org/u/romgo)\
**Post date:** [February 25, 2020, 8:03am UTC](https://community.graylog.org/t/nan-value-for-statistics/14134/2 "2020-02-25T08:03:54Z")

</div>

Hi,

since I upgraded to 3.2 the grok pattern data type is working as expected.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/3X/c/7/c7c09c6b5099570133d6502b83f50ba4430de5b6.png) [@system](https://community.graylog.org/u/system)\
**Post date:** [March 10, 2020, 8:03am UTC](https://community.graylog.org/t/nan-value-for-statistics/14134/3 "2020-03-10T08:03:59Z")

</div>

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.