# Pattern not defined grok error

**URL:** <https://discuss.elastic.co/t/pattern-not-defined-grok-error/236139>\
**Category:** Elastic Stack\
**Created:** [June 8, 2020, 8:24am UTC](https://discuss.elastic.co/t/pattern-not-defined-grok-error/236139 "2020-06-08T08:24:14Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![NITISH\_GUPTA](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nitish_gupta/32/69567_2.png) [@NITISH\_GUPTA](https://discuss.elastic.co/u/NITISH_GUPTA)\
**Post date:** [June 8, 2020, 8:24am UTC](https://discuss.elastic.co/t/pattern-not-defined-grok-error/236139/1 "2020-06-08T08:24:14Z")

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Hi , I read all the discussions related to custom grok patterns but couldn't find a solution to my issue. I am getting error as:  
` [2020-06-08T03:00:07,412][ERROR][logstash.javapipeline] Pipeline aborted due to error {:pipeline_id=>"main", :exception=>#<Grok::PatternError: pattern %{PAYLOAD:payloads} not defined>`  
Also my config file is as follows:

```auto
        file {
                path => "/v/region/ ******* thread-2.log" 
                start_position => "beginning"
        }

}

filter {
        grok {
                patterns_dir => [" ***/patterns"]
                match => { "message" => "%{PAYLOAD:payloads}" }
                }
        }
output {
        elasticsearch {
                hosts => " ****"
                index => "testindex2"
                }
        stdout { }
} 

```

My patterns directory contains a file called payload. It's content are as:

`PAYLOAD ^payload.*`

I meant to store a log line starting with the string payload to my message field.

Please help me with this.  
Thanks in advance.

---

<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:** [November 4, 2022, 8:01am UTC](https://discuss.elastic.co/t/pattern-not-defined-grok-error/236139/2 "2022-11-04T08:01:32Z")

</div>