# Logstash grok parse doesn't parse error code

**URL:** <https://discuss.elastic.co/t/logstash-grok-parse-doesnt-parse-error-code/197425>\
**Category:** Logstash\
**Created:** [August 29, 2019, 11:26pm UTC](https://discuss.elastic.co/t/logstash-grok-parse-doesnt-parse-error-code/197425 "2019-08-29T23:26:29Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![EZprogramming](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ezprogramming/32/57291_2.png) [@EZprogramming](https://discuss.elastic.co/u/EZprogramming)\
**Post date:** [August 29, 2019, 11:26pm UTC](https://discuss.elastic.co/t/logstash-grok-parse-doesnt-parse-error-code/197425/1 "2019-08-29T23:26:29Z")

</div>

Logstash version: 7.0.1

Given filename =\> "EUI106\_occurances", I want to have code =\> "EUI106".

The following grok parse filter doesn't work:

```
filter{
   grok {
      match => { "filename", "%{POSTFIX_QUEUEID:code}" }
   }
}
```

---

<div class="post-metadata">

**Author:** ![EZprogramming](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ezprogramming/32/57291_2.png) [@EZprogramming](https://discuss.elastic.co/u/EZprogramming)\
**Post date:** [August 29, 2019, 11:36pm UTC](https://discuss.elastic.co/t/logstash-grok-parse-doesnt-parse-error-code/197425/2 "2019-08-29T23:36:44Z")

</div>

```
grok {
    match => ["filename","%{GREEDYDATA}/%{GREEDYDATA:code}\_occurances"]
}

```

**or**

```
grok {
    match => ["filename","%{GREEDYDATA}/%{GREEDYDATA:code}"]
}
mutate {
    gsub => ["code", "_occurances", ""]
}
```

---

<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:** [September 26, 2019, 11:36pm UTC](https://discuss.elastic.co/t/logstash-grok-parse-doesnt-parse-error-code/197425/3 "2019-09-26T23:36:57Z")

</div>

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