# Why there's no agent field available once used %{COMBINEDAPACHELOG} in ELK Stack 7.1

**URL:** <https://discuss.elastic.co/t/why-theres-no-agent-field-available-once-used-combinedapachelog-in-elk-stack-7-1/186402>\
**Category:** Logstash\
**Created:** [June 19, 2019, 7:44am UTC](https://discuss.elastic.co/t/why-theres-no-agent-field-available-once-used-combinedapachelog-in-elk-stack-7-1/186402 "2019-06-19T07:44:50Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![mark.quilates](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mark.quilates/32/24802_2.png) [@mark.quilates](https://discuss.elastic.co/u/mark.quilates)\
**Post date:** [June 19, 2019, 7:44am UTC](https://discuss.elastic.co/t/why-theres-no-agent-field-available-once-used-combinedapachelog-in-elk-stack-7-1/186402/1 "2019-06-19T07:44:50Z")

</div>

Hi

Any idea why there's no "agent" field available once used %{COMBINEDAPACHELOG} in ELK Stack 7.1?

Since what to use useragent:

```
				useragent {
    				source => "agent"
				}

```

Any idea how?

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [June 19, 2019, 1:04pm UTC](https://discuss.elastic.co/t/why-theres-no-agent-field-available-once-used-combinedapachelog-in-elk-stack-7-1/186402/2 "2019-06-19T13:04:06Z")

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```
grok { match => { "message" => "%{COMBINEDAPACHELOG}" } }

```

produces a field called agent for me, containing the final quoted string. What do your log file entries look like?

---

<div class="post-metadata">

**Author:** ![mark.quilates](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mark.quilates/32/24802_2.png) [@mark.quilates](https://discuss.elastic.co/u/mark.quilates)\
**Post date:** [June 21, 2019, 5:36am UTC](https://discuss.elastic.co/t/why-theres-no-agent-field-available-once-used-combinedapachelog-in-elk-stack-7-1/186402/3 "2019-06-21T05:36:12Z")

</div>

the nginx logs

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 19, 2019, 5:36am UTC](https://discuss.elastic.co/t/why-theres-no-agent-field-available-once-used-combinedapachelog-in-elk-stack-7-1/186402/4 "2019-07-19T05:36:14Z")

</div>

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